Anchor bolts, as a connection system used at the base of most highway support structures, commonly suffer from loosening effects that may impose high risk on collapse for the structures. The TRB IDEA (Innovations Deserving Exploratory Analysis) Program's NCHRP IDEA Final Report for Project 196: Smart Installation and Monitoring System for Large Anchor Bolts of Support Structures Made with 3D Printing Enhancement aims to develop a capacitance-based smart washer system that serves as an efficie...

State departments of transportation (DOTs) have various practices for ensuring information security, cybersecurity, and physical security, and for controlling permissions for interactive tools, which can make collaboration, information access, and knowledge sharing difficult. The TRB National Cooperative Highway Research Program's NCHRP Research Report 1034: Guidelines on Collaboration and Information Security for State DOTs presents guidelines for facilitating secure collaboration and inform...

Developments in unmanned aircraft systems (UAS) technology and the seemingly endless applications of this technology offer society a broad spectrum of enhancements and solutions to many problems. The TRB Airport Cooperative Research Program's ACRP Research Report 238: Airfield Design for Large Unmanned Aircraft Systems—A Guide provides a fundamental understanding of large UAS (L-UAS) and their typical supporting infrastructure needs, which will assist airport sponsors with determining po...

Connected vehicles (CVs), travelers using connected mobile devices, intelligent transportation system (ITS) devices, and traffic management systems sharing and using SAE J2735 basic safety messages (BSMs) and other CV messages have the potential to transform transportation systems management, traveler safety and mobility, and system productivity. The TRB National Cooperative Highway Research Program's NCHRP Research Report 997: Algorithms to Convert Basic Safety Messages into Traffic Measures...

Technology is changing the way people move and is reshaping mobility and society. The integration of transportation modes, real-time information, and instant communication and dispatch—possible with the click of a mouse or the touch of a smartphone app—is redefining mobility. The TRB National Cooperative Highway Research Program's NCHRP Research Report 1009: Shared Automated Vehicle Toolkit: Policies and Planning Considerations for Implementation provides resources that identify key stakehold...

There is a growing interest in deploying autonomous vehicles for public transportation. In the U.S., transportation agencies are exploring the impacts of incorporating automation on safety or mobility, especially for low-speed automated vehicles (LSAV). The TRB IDEA (Innovations Deserving Exploratory Analysis) Program's Transit IDEA Final Report 98: Safety Assessment of the Interaction Between the Autonomous Shuttle Bus and Vulnerable Road Users identifies potential safety issues regarding LS...

Historically, state departments of transportation (DOTs) have employed on-site workforces to execute infrastructure inspection using traditional inspection methods. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 582: Highway Infrastructure Inspection Practices for the Digital Age documents the various technologies - such as unmanned aircraft systems (UASs), embedded and remote sensors, intelligent machines, mobile devices, and new software applications - used by DOTs ...

In the last decade, new technologies have transformed all stages of highway construction as more industry stakeholders have begun incorporating new technologies into their daily construction activities. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 578: Use of Unmanned Aerial Systems for Highway Construction documents the use of Unmanned Aircraft Systems (UAS) by state departments of transportation (DOTs) during highway construction, identifies potential benefits and...

The COVID-19 pandemic is having a profound effect on every infrastructure sector in North America, including transit systems, and on the information technology and operational technology systems that are embedded in their ongoing operations. The TRB Transit Cooperative Research Program's TCRP Synthesis 158: Cybersecurity in Transit Systems identifies and documents emerging cybersecurity trends related to teleworking/remote worker offices, contactless customer services, real-time information s...

The July-August 2021 issue of TR News —with a cover feature on research needs for the marine transportation system of the future—is available in full online.  Other feature articles in the issue include members of the Marine Board and TRB’s Marine Group standing committees investigating critically important topics for innovation and research in, and transformation of, the marine transportation system to help achieve necessary strides in emissions reduction, automation, big data, and resi...

Rural corridors often include long stretches of highway with limited power, communications, and intelligent transportation systems (ITS) infrastructure; long distances between cities or services for travelers; different traffic and roadway characteristics; and significant incident-related rerouting distances. The National Cooperative Highway Research Program's NCHRP Research Report 978: Initiating the Systems Engineering Process for Rural Connected Vehicle Corridors, Volume 3: Model System Re...

Connected vehicle deployments in rural areas present opportunities for potential improvements in safety, mobility, and efficiency. It is important for the agencies that operate and maintain rural corridors to have a vision for connected vehicle deployment. The National Cooperative Highway Research Program's NCHRP Research Report 978: Initiating the Systems Engineering Process for Rural Connected Vehicle Corridors, Volume 2: Model Concept of Operations is designed to guide agencies responsible...

Connected vehicle technology has garnered substantial consideration and analysis in urban areas but less in rural settings due to infrastructure constraints. The National Cooperative Highway Research Program's NCHRP Research Report 978: Initiating the Systems Engineering Process for Rural Connected Vehicle Corridors, Volume 1: Research Overview identifies good starting points for these projects and also develops a model concept of operations ( Volume 2 ), a model system requirements specifica...

In 1999, the Federal Communications Commission (FCC) allocated the intelligent transportation system (ITS) band, also known as the “5.9 GHz band,” for transportation purposes including connected and automated vehicle (CAV) technologies. These technologies enable a host of applications for vehicle‐to-vehicle, vehicle‐to‐infrastructure, and vehicle‐to‐pedestrian communication — collectively known as vehicle‐to‐everything (V2X). Today, the connectivity required for V2X is enabled by dedicated sh...

CEOs of departments of transportation (DOTs) face many challenges, including some that will have serious impacts on people's mobility and safety, and possibly on the tenure of CEOs. Many of these challenges revolve around the resilience of the transportation system—how well it can withstand disruptions from natural causes, catastrophic failures of the infrastructure or cyber events, and how quickly the agency can restore services when they are impacted. The TRB National Cooperative Highway Re...

Intelligent transportation systems and, in particular, computer-aided dispatch and automatic vehicle location (CAD/AVL), have become quasi-universal in urban bus operations and support a variety of functions. The TRB Transit Cooperative Research Program's TCRP Synthesis 155: Intelligent Transportation Systems in Headway-Based Bus Service synthesizes the current state of the practice of headway-based service operations and focuses on the proactive use of intelligent transportation systems tech...

The September–October 2020 issue of TRB's magazine is now available in full online. Issue 330 includes the cover story, “Recycled Material Web Map,” and features articles on topics including incorporating resiliency into freight mobility, living with transformational technologies, and pollution-reducing highway barriers. TR News is TRB's bimonthly magazine featuring timely articles on innovative and state-of-the-art research and practice in all modes of transportation. It also includes brief ...

Ongoing and emerging shifts in customer ground access behavior, resulting from the growing use of transportation network companies (TNCs) and the eventual adoption of emerging technologies, are posing a significant challenge to the reliance of airports on parking revenue. The TRB Airport Cooperative Research Program's ACRP Research Report 225: Rethinking Airport Parking Facilities to Protect and Enhance Non-Aeronautical Revenues is a guidance document that identifies near-term and long-term s...

Interest in driverless vehicles, including low-speed automated vehicles (LSAVs), continues to expand globally and in the United States. The TRB Transit Cooperative Research Program's TCRP Research Report 220: Low-Speed Automated Vehicles (LSAVs) in Public Transportation presents current use cases for LSAVs and provides a practitioner guide for planning and implementing LSAV services as a new public transportation service.

As unmanned systems (UxS) continue to develop and be used by other military services and federal agencies, the U.S. Coast Guard should proceed more aggressively and deliberately in taking advantage of UxS advancements, says a new congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine. The Coast Guard should also produce a high-level strategy with critical goals and actionable steps toward fully utilizing UxS technology, according to TRB Special Repo...

Commercial ground transportation at U.S. airports includes public transit, door-to-door shuttle van service, charter buses, limousines, rental cars, taxicabs, hotel courtesy shuttles, wheel chair services, and courier operators. Technological developments, such as transportation network companies, car-sharing operations, and driverless cars, have added more options and challenges for airport ground transportation operations. The TRB Airport Cooperative Research Program's ACRP Legal Research D...

The amount of data surrounding the application of emerging technologies is expanding, producing “big data” at magnitudes not previously seen. While a few agencies have found some success with individual projects, most are uncertain on how to handle this level of big data at an organizational level. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 282: Framework for Managing Data from Emerging Transportation Technologies to Support Decision-Making is designed to ...

State Departments of Transportation (DOTs) and other government agencies recognize the value of connected vehicle (CV) technologies in helping achieve the strategic objectives of saving lives and relieving congestion. Several agencies are currently planning and preparing for a future where CV technologies could become a part of their routine business operations. A core consideration in any such planning effort is an assessment of the need for and the nature of public CV infrastructure investm...

There are issues, opportunities, and challenges related to technology-enabled mobility services, and lots of ways that transit can learn from, build upon, and interface with new ways of traveling. The TRB Transit Cooperative Research Program's TCRP Report 188: Shared Mobility and the Transformation of Public Transit examines the relationship of public transportation (including paratransit and demand-responsive services) to shared modes, including bikesharing, carsharing, microtransit, and rid...

The TRB Airport Cooperative Research Program's ACRP Web-Only Document 42: Toolkits and Resource Library for Airports and Unmanned Aircraft Systems provides supplemental material to Volumes 1 , 2 , and 3 of ACRP Research Report 212: Airports and Unmanned Aircraft Systems .

The introduction of unmanned aircraft systems (UAS) has presented a wide range of new safety, economic, operational, regulatory, community, environmental, and infrastructure challenges to airports and the National Airspace System. These risks are further complicated by the dynamic and shifting nature of UAS technologies. The Airport Cooperative Research Program's ACRP Research Report 212: Airports and Unmanned Aircraft Systems provides guidance for airports on UAS in the areas of managing UAS...

The introduction of unmanned aircraft systems (UAS) has presented a wide range of new safety, economic, operational, regulatory, community, environmental, and infrastructure challenges to airports and the National Airspace System. These risks are further complicated by the dynamic and shifting nature of UAS technologies. The Airport Cooperative Research Program's ACRP Research Report 212: Airports and Unmanned Aircraft Systems provides guidance for airports on UAS in the areas of managing UAS...

The introduction of unmanned aircraft systems (UAS) has presented a wide range of new safety, economic, operational, regulatory, community, environmental, and infrastructure challenges to airports and the National Airspace System. These risks are further complicated by the dynamic and shifting nature of UAS technologies. The Airport Cooperative Research Program's ACRP Research Report 212: Airports and Unmanned Aircraft Systems provides guidance for airports on UAS in the areas of managing UAS...

Traffic flow characteristics deteriorate significantly in fog conditions compared to normal weather conditions, which might result in high crash risk. "Understanding the Highway Safety Benefits of Different Approaches of Connected Vehicles in Reduced Visibility Conditions," by Md Sharikur Rahman, Mohamed Abdel-Aty, Ling Wang, and Jaeyoung Lee, from 2018, was 2019's fourth-most cited article from Transportation Research Record . The study examined how to improve traffic safety in fog condition...

Small events pose threats of great consequences since the impact of any incident is magnified when a transportation network is operating at or past its capacity—as is the case in portions of many states as travel demand on their transportation networks grows. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 266: Developing a Physical and Cyber Security Primer for Transportation Agencies is a supplemental document to NCHRP Research Report 930: Update of Security ...

Since 2009, when NCHRP's last Security 101 report was released, there have been significant advances in transportation security approaches, including new strategies, programs, and ways of doing business that have increased the security of transportation systems as well as ensured their resiliency. Hazards and threats to the system have also continued to evolve since 2009. While the incidence of large-scale terrorist attacks has remained small, transportation agencies are at increasingly ...

Lifestyle factors play an important role in shaping use of autonomous vehicles. Younger, urban residents who are more educated and technologically savvy are more likely to be early adopters of AV technologies than are older, suburban, and rural individuals, a fact that favors a sharing-based service model over private ownership. "Modeling Individual Preferences for Ownership and Sharing of Autonomous Vehicle Technologies,"  by Patrícia S. Lavieri, Venu M. Garikapati, Chandra R. Bhat, Ram...

Issue Number 326 of TR News magazine is available in full to subscribers. Here is a sample from the issue: a feature article on the trap that drivers could fall into by believing that autonomous vehicles are more capable than they really are. As with traditional driving instruction, a solid understanding of the concepts of automation is important—not just knowing which buttons to press.

Transportation network companies (TNCs) have become an increasingly popular form of transportation since initially permitted at some airports in 2014. While many airports receive significant revenue from TNCs, others have recorded declines in parking revenue and rental car transactions that are perceived to be a direct result of TNC operations. The TRB Airport Cooperative Research Program's ACRP Research Report 215: Transportation Network Companies (TNCs): Impacts to Airport Revenues and Oper...

A clear funding and business case –neither of which have yet been clearly articulated – will be important for the success of AVs and shared mobility. Transportation Research Circular E-C261: TRB Forum on Preparing for Automated Vehicles and Shared Mobility: Mini-Workshop on the Economic Implications of Automated Vehicles and Shared Mobility details the roles of government and the public sector as these technologies are advanced and also lists research that is needed. The National Academies–TR...

Examples of transformational technologies—many are discussed in technical and popular media—include wireless telecommunications, shared vehicles, connected vehicles, fully autonomous vehicles, alternative-fuel vehicles, smart cities and communities, big data analytics, internet-of-things, as well as UAVs or drones, 3-D printing, and more. Public agencies face significant challenges continuing to perform their governmental functions in the face of the private sector’s prodigious output of thes...

Transportation agencies face a complex set of challenges as they make cross-asset resource allocation decisions. Such decisions entail deciding how much to invest in an agency’s roads, bridges, intelligent transportation systems (ITS), and other traffic and safety assets to achieve a variety of competing objectives, such as improving pavement and bridge conditions, increasing mobility, and enhancing safety. The TRB National Cooperative Highway Research Program's NCHRP Research Report 921: Cas...

The unmanned aircraft systems (UAS) industry is on the cutting edge of aviation innovation. Airports, including tenants and contractors, are discovering the benefits of UAS to their operations and bottom line. Yet, with the diversity of UAS applications at airports, there has been a lack of relevant industry data on this topic to inform the airport industry on current practices. The TRB Airport Cooperative Research Program's ACRP Synthesis 104: Current Landscape of Unmanned Aircraft Systems a...

The deployments of automated vehicles, shared mobility services, and other transformational transportation technologies have the potential to dramatically increase safety, reduce congestion, improve access, enhance sustainability, and spur economic development. However, success in meeting these goals is not assured, and there are significant risks that these deployments could cause unintended consequences. The National Academies-TRB Forum on Preparing for Automated Vehicles and Shared Mobilit...

Automated vehicles, shared mobility, and other transformational technologies in transportation provide a unique opportunity to make significant advances in meeting societal goals. TRB's Transportation Research E-Circular 253: Transformational Technologies in Transportation: Impacts on Traditional Research Processes and Programs explores whether and how, in an era of rapidly evolving transformational technologies, research projects and processes can provide the needed answers in a timely manne...

"Big data" is not new, but applications in the field of transportation are more recent, having occurred within the past few years, and include applications in the areas of planning, parking, trucking, public transportation, operations, ITS, and other more niche areas. A significant gap exists between the current state of the practice in big data analytics (such as image recognition and graph analytics) and the state of DOT applications of data for traffic incident management ( TIM) (such as ...

How do we bring governance into the era of digitization so it can manage demand and supply digitally? At the same time, it is necessary to correct for the existing inequities in our system, working closer with public- and private-sector partners and developing the infrastructure needed to ensure that the transition to shared and autonomous vehicles (SAVs) minimizes the potential challenges and takes advantage of opportunities. This transition and its effects will not happen tomorrow, and ther...

Public transit agencies are increasingly partnering with mobility service providers. Among these providers are transportation network companies (TNCs), which include companies like Uber and Lyft and are the specific focus of this research effort. The transit industry has produced research to describe primary considerations transit agencies should have in mind for partnerships with TNCs, but existing research has yet to identify specific project frameworks for transit agencies that have decide...

The uses and levels of maturity of five advanced technology areas visualization and modeling, interconnected technologies, safety technologies, instrumentation and sensors, and unmanned aircraft systems in transportation highway construction projects are documented in TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 534: Emerging Technologies for Construction Delivery. The synthesis also investigates the implementation barriers and success factors for these technology are...

TRB Special Report 331 concludes that with sustained and adequate funding and modest improvements in research, development, and technology (RD&T), the Federal Highway Administration (FHWA) and the Intelligent Transportation Systems Joint Program Office (ITS JPO) will continue to serve and advance the national interest and international competitiveness well into the future. TRB’s Research and Technology Coordinating Committee, which produced the report, believes that rapidly advancing tech...

TRB’s Forum on Preparing for Automated Vehicles and Shared Mobility has released Transportation Research Circular E-C247: TRB Forum on Preparing for Automated Vehicles and Shared Mobility.  The circular provides a summary of a February 2019 mini-workshop on the importance and role of connectivity within the automated vehicles and shared mobility environment. Key takeaways from the workshop suggest that (1) more needs to be done to create consumer awareness of the differences between and ...

A featured article in the March-April 2019 issue of TR News explores TRB's most recent list of the critical issues facing transportation today. Theses issues include transformational technologies and services; serving a growing and shifting population; energy and sustainability; resilience and security; safety and public health; equity; governance; system performance and management; funding and financing; goods movement; institutional and workforce capacity; and research and innovation. ...

TRB’s Transit Cooperative Research Program (TCRP) Synthesis 141: Microtransit or General Public Demand–Response Transit Services: State of the Practice provides an overview of the current state of the practice of transit systems that are directly providing general public demand–response or microtransit with their own vehicles and personnel or using a traditional contractor. The report presents a literature review and results from a survey of 22 transit agencies that have had current experienc...

The full edition of the September-October 2018 TR News is now available. This edition explores the impacts of the 2017 solar eclipse on traffic. Articles also focus on connected and automated vehicles, automated transit applications, and data-driven project selection. The TR News is TRB's bimonthly magazine featuring timely articles on innovative and state-of-the-art research and practice in all modes of transportation. It also includes brief news items of interest to the transportation commu...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 891: Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles identifies and evaluates opportunities, constraints, and guiding principles for implementing dedicated lanes for connected and automated vehicles. This report describes conditions amenable to dedicating lanes for users of these vehicles and develops the necessary guidance to deploy them in a safe and efficient manner. This analysis...

TRB's Conference Proceedings 56: Socioeconomic Impacts of Automated and Connected Vehicles summarizes a symposium held in June 26–27, 2018, in Brussels, Belgium. Hosted by the European Commission and TRB, it was the sixth annual symposium sponsored by the European Commission and the United States. The goals of these symposia are to promote common understanding, efficiencies, and trans-Atlantic cooperation within the international transportation research community while accelerating transporta...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 896: Updating Regional Transportation Planning and Modeling Tools to Address Impacts of Connected and Automated Vehicles, Volume 1: Executive Summary summarizes guidelines to help agencies update their modeling and forecasting tools to address expected impacts of connected and automated vehicles (CAVs) on transportation supply, road capacity, and travel demand components. Under requirements for long-range transportati...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 896: Updating Regional Transportation Planning and Modeling Tools to Address Impacts of Connected and Automated Vehicles, Volume 2: Guidance provides detailed information and guidelines for state departments of transportation (DOTs) and metropolitan planning organizations (MPOs) to help update their modeling and forecasting tools. These tools address expected impacts of connected and automated vehicles (CAVs) on trans...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 253: Implications of Connected and Automated Driving Systems, Vol. 4: Autonomous Vehicle Action Plan (AVAP) develops awareness of the legislative landscape and the foundational laws and regulations that may need to be prioritized for modification for Connected and Automated Driving Systems (C/ADSs) technologies. The AVAP is intended to provide guidance and resources to state departments of motor vehicles (DMVs) and ...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 253: Implications of Connected and Automated Driving Systems, Vol. 5: Developing the Autonomous Vehicle Action Plan provides technical background on developing Volumes 1 through 4 of NCHRP Web-Only Document 253. It includes further background on terminology and definitions used in the suite of reports; legal and regulatory reviews and needs assessment; state legal and regulatory audit; a prioritization and harmoniza...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 253: Implications of Connected and Automated Driving Systems, Vol. 1: Legal Landscape explores federal, state, and international legal activities and practices regarding Connected and Automated Vehicles and Highly Automated Vehicles (C/AV/HAVs): Section 1 reviews United States federal activities within the sphere of regulating C/AV/HAVs. Section 2 reviews practices in each of the 50 states and local activities that ...

TRB's Airport Cooperative Research Program (ACRP) Research Report 191: A Primer to Prepare for the Connected Airport and the Internet of Things introduces the concept of the Internet of Things (IoT) within the airport environment to leverage current and emerging technologies. IoT can be used to provide information and services to airport passengers with current and evolving technologies. Airports, airlines, and other stakeholders can use these innovative technologies and data to enhance ...

TRB E-Circular 236: National Academies–TRB Forum on Preparing for Automated Vehicles and Shared Mobility summarizes the deliberations of a TRB forum launched in early 2018 to facilitate evidence-based research needed to deploy automated vehicle technologies in a manner and timeframe that informs policy to meet long-term goals. The deployments of automated vehicles, shared mobility services, and other transformational transportation technologies have the potential to dramatically increase safe...

TRB's Airport Cooperative Research Program (ACRP) WebResource 5: Tools and Case Studies for NextGen for Airports is a companion to the five-volume ACRP Report 150: NextGen for Airports. It provides downloadable engagement materials from the NextGen Outreach Toolkit, discussed in Volume 2: Engaging Airport Stakeholders, and the Public Information Toolkit, discussed in Volume 3: Resources for Airports. A table that identifies the volume and page number of all case studies discussed in the five ...

The National Academy of Engineering (NAE) has released Autonomy on Land and Sea and in the Air and Space: Proceedings of a Forum that summarizes the presentations and discussions of the 2017 NAE Annual Meeting. Autonomy is multidisciplinary, multicultural, and global in its development and applications. Autonomous vehicles rely on communications, artificial intelligence, sensors, virtual and enhanced reality, big data, security, and many other technologies.

TRB's Transit Cooperative Research Program (TCRP) Research Report 195: Broadening Understanding of the Interplay Among Public Transit, Shared Mobility, and Personal Automobiles explores the effects of app-based transportation network companies on the cities in which they operate, including on public transit ridership, single-occupancy vehicle trips, and traffic congestion. Built upon the findings of TCRP Research Report 188 , this report explores how shared modes—and ridesourcing companies in...

TRB’s Transportation Research Record: Journal of the Transportation Research Board has released 15 early access papers addressing data and information technology, including: Vulnerability of Traffic Control System Under Cyber-Attacks Using Falsified Data ( link ) Interstate Speed Profiles ( link ) A Vibration-Based Vehicle Classification System using Distributed Optical Sensing Technology ( link ) A Methodology to Assess the Quality of Travel Time Estimation and Incident Detection Based on Co...

The National Academies of Sciences, Engineering, and Medicine has released Human-Automation Interaction Considerations for Unmanned Aerial Systems Integration into the National Airspace System: Proceedings of a Workshop, which summarizes the presentations and discussions of a Jannuary 2018 workshop. Prior to 2012, unmanned aircraft systems (UAS) technology had been primarily used by the military and hobbyists, but it has more recently transitioned to broader application, including commercial ...

TRB's E-Circular 232: Automated Vehicle Symposium 2017: Summary of a Symposium highlights the themes from an event that took place on July 11–13, 2017 in San Francisco, California. The event explored the development, testing, building, and deployment of autonomous vehicles (AVs). The 2017 AVS provided the opportunity for communication, collaboration, and information sharing on a wide range of topics, including potential public policy, safety and security, ethical, and equity concerns, as well...

TRB's Transit Cooperative Research Program (TCRP) Synthesis 132: Public Transit and Bikesharing explores cooperative transit and bikesharing relationships and documents the experiences of transit systems with bikesharing as a mode. An increasing number of transit agencies have developed cooperative arrangements with bikesharing programs to strengthen the relationship between the modes. The implementation and integration of bikesharing programs can sometimes present challenges to transit agenc...

TRB's Airport Cooperative Research Program (ACRP) Report 150: NextGen for Airports, A Primer broadly address potential airport impacts and include background information so that airport personnel can discern which NextGen programs will impact them and how. View the suite of materials related to ACRP Report 150: NextGen for Airports: Volume 1 : Understanding the Airport’s Role in Performance-Based Navigation: Resource Guide Volume 2 : Engaging Airport Stakeholders: Guidebook Volume 3 : Resourc...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2650 consists of 18 papers that explore public transportation, including: Development of a Key Performance Indicator System to Benchmark Relative Paratransit Performance Fickle or Flexible? Assessing Paratransit Reliability with Smartphones in Accra, Ghana Achieving Mobility Access for Older Adults Through Group Travel Instruction Viamigo: Monitoring Tool to Support Independent Travel by Persons with Intel...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2649 consists of 13 papers that explore public transportation, including: Train Overcrowding: Investigation of the Provision of Better Information to Mitigate the Issues Use of Automated Vehicle Location Data for Route- and Segment-Level Analyses of Bus Route Reliability and Speed Effect of Fare Policies on Dwell Time: Case Study for the Pittsburgh Region Traffic and Transit Travel Time Reliability Indexes...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2615 consists of 18 papers that explore highway capacity including: Preparing Oregon for Connected Vehicle Deployment: Application Prioritization Process Evaluation and Testing of Driver-Assistive Truck Platooning: Phase 2 Final Results Influence of Remotely Operated Stop–Slow Controls on Driver Behavior in Work Zones Estimation of Saturation Headway in Work Zones on Urban Streets Naturalistic Study of Tru...

TRB's E-Circular 226: Transportation System Resilience: Preparation, Recovery, and Adaptation explores research issues related to implementing transportation systems resilience, and explores themes of a whole system approach to resilience, weather and advances in forecasting, an integrated approach to cyber-physical security for transportation, a European perspective on research for resilient road infrastructure, training and recruiting qualified employees who can assist during adverse events...

TRB’s Transportation Research Record (TRR), No. 2605 consists of 13 papers that explore socioeconomics, sustainability, health, and human factors in transportation, including: Understanding Livable Streets in the Context of the Arterials That Surround Them Equity of Bikeway Distribution in Minneapolis, Minnesota Ballpark Method for Estimating Pedestrian and Bicyclist Exposure in Seattle, Washington: Potential Option for Resource-Constrained Cities in an Age of Big Data Data-Driven Urban Perfo...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2621 consists of 10 papers that explore intelligent transportation systems, including: Real-Time Associative Memory–Based Rear-End Collision Warning System Reducing Vehicle Fuel Consumption and Delay at Signalized Intersections: Controlled-Field Evaluation of Effectiveness of Infrastructure-to-Vehicle Communication Vehicle-to-Pedestrian Communication Modeling and Collision Avoiding Method in Connected Vehi...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2626 consists of 12 papers that explore aviation, including: Investigating Neighborhood Change in Airport-Adjacent Communities in Multiairport Regions, 1970–2010 Accuracy Assessment of Aircraft Transponder–Based Devices for Measuring Airport Operations Understanding the Trade-Off Between Maximum Passenger Throughput and Airline Equity in Allocating Capacity Under Severe Weather Conditions Unmanned Aerial V...

TRB's Airport Cooperative Research Program (ACRP) Legal Research Digest 32: Evolving Law on Airport Implications by Unmanned Aerial Systems provides guidance to enhance understanding of the basic legal and operational issues presented by civil unmanned aerial systems (UAS), and evaluates best practices for managing these issues. The digest covers background on UAS uses, applications, regulations, and definitions, leading to operations within the National Airspace System (NAS), the issues of f...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2622 consists of 11 papers that explore traffic flow theory, including: Investigating the Effects of Reserved Lanes for Autonomous Vehicles on Congestion and Travel Time Reliability SimMobility Short-Term: An Integrated Microscopic Mobility Simulator Network Flow Relations and Travel Time Reliability in a Connected Environment Resuming Manual Control or Not? Modeling Choices of Control Transitions in Full-...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2620 consists of 9 papers that explore traffic signal systems, including: Derivation of Decision Boundaries for Left-Turn Treatments at Signalized Intersections Use of Microsimulation to Evaluate Signal-Phasing Schemes at Diverging Diamond Interchanges Use of Big Data to Evaluate and Improve Performance of Traffic Signal Systems in Resource-Constrained Countries: Evidence from Cebu City, Philippines Person...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2630 consists of 18 papers that explore construction, including: Estimating Earthwork Volumes Through Use of Unmanned Aerial Systems Assessment of State Agencies’ Practices in Managing Geotechnical Risk in Design–Build Projects Roles and Responsibilities of Independent Cost Estimator in Construction Manager–General Contractor Highway Construction Monitoring During Lateral Bridge Slide Field and Laboratory ...

TRB’s Transportation Research Record (TRR), No. 2665 consists of 9 papers that explore travel behavior and values, including: Modeling Individual Preferences for Ownership and Sharing of Autonomous Vehicle Technologies Integrated Agent-Based Travel Behavior and Dynamic Traffic Microsimulation for Ramp-Metering Analysis Optimization Method to Improve Ecodriving Acceptance and Effectiveness Based on Driver Type Classification A Theory of Strong Ties, Weak Ties, and Activity Behavior: Leisure Ac...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2619 consists of 9 papers that explore traffic signal systems, including: Adaptive Coordination Based on Connected Vehicle Technology Safety-Based Left-Turn Phasing Decisions for Signalized Intersections Framework for Quantitative Annual Evaluation of Traffic Signal Systems Interlinking Vissim and ns-3 for Connected Vehicle Simulation: Case Study of Intelligent Dilemma Zone Avoidance Evaluating Transit Pri...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2640 consists of 12 papers that explore pavements, including: Load Spectra–Incorporated Fatigue Cracking Model Implementation and Case Study Updates to Hourly Climate Data for Use in AASHTOWare Pavement Mechanistic–Empirical Design Autonomous Vehicles: Assessment of the Implications of Truck Positioning on Flexible Pavement Performance and Design Integrating the Dynamic Modulus of Asphalt Mixes in the 1993...

TRB's National Cooperative Highway Research Program (NCHRP) has released  Strategies to Advance Automated and Connected Vehicles: Briefing Document. It is intended for state, regional, and local agency and political decision makers who are framing public policy making for these transformational technologies. The briefing document makes the case for taking action in spite of uncertainties and presents 18 policy and planning strategies that may be useful in advancing societal goals. The b...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 845: Advancing Automated and Connected Vehicles: Policy and Planning Strategies for State and Local Transportation Agencies assesses policy and planning strategies at the state, regional, and local levels that could influence private-sector automated vehicle (AV) and connected vehicle (CV) choices to positively affect societal goals. The report aims to assist agencies with exploring actions that might increase the lik...

TRB's Airport Cooperative Research Program (ACRP) Synthesis 84: Transportation Network Companies: Challenges and Opportunities for Airport Operators compiles experiences and effective practices by airports in facilitating customer access to Transportation Network Companies (TNCs) like Uber and Lyft. This synthesis also summarizes the amount of revenue airports receive from TNCs and how TNCs are affecting airport operations and other businesses. As of December 2016, TNCs are permitted to opera...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2625, includes 7 papers that explore information related to connected and automated vehicles, including: Analysis of the Effects of Connected–Automated Vehicle Technologies on Travel Demand Driving Mode Decision Making for Intelligent Vehicles in Stressful Traffic Events Lane-Changing Feedback Control for Efficient Lane Assignment at Motorway Bottlenecks Multiobjective Optimization Framework for Cooperativ...

The full edition of the January-February 2017 TR News is now available. This edition explores information about laws affecting driverless vehicles, the freight project selection process, environmental performance measures, and sharing operations data. The TR News is TRB's bimonthly magazine featuring timely articles on innovative and state-of-the-art research and practice in all modes of transportation. It also includes brief news items of interest to the transportation community,  resea...

TRB's E-Circular 222: Automated Vehicles Symposium 2016 presents the proceedings from the Automated Vehicle Symposium (AVS) on July 19-21, 2016 in San Francisco, California. The 2016 AVS provided the opportunity for communication, collaboration, and information sharing on a wide range of topics, including potential public policy, safety and security, ethics, and equity concerns, as well as technology innovations and applications. The presentations by speakers in the general sessions are summa...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2653 consists of 11 papers that explore transportation planning, including: Travel and the Built Environment: Insights Using Activity Densities, the Sprawl Index, and Neighborhood Types Closing the Induced Vehicle Travel Gap Between Research and Practice Delays, Detours, and Diversions: Paths to Fully Executed Safe Routes to School Projects Taxonomy of Shared Autonomous Vehicle Fleet Management Problems to...

TRB's National Cooperative Highway Research Program (NCHRP) has released a brochure that summarizes its research in the field of connected and automated vehicle. This resource explores how TRB is coordinating research to explore the legal, societal, operational, and other impacts that connected and automated vehicle technology may have on transportation agencies and the traveling public. The brochure explores how TRB is administering projects, issuing reports, and convening top-level leaders ...

TRB's Airport Cooperative Research Program (ACRP) Report 150: NextGen for Airports, Volume 5: Airport Planning and Development provides guidance to help airports of all sizes plan for and incorporate NextGen capabilities. The document will help airports accomodate Next Generation Air Transportation System (NextGen) requirements while also taking advantage of the potential benefits of these federal programs designed to modernize the National Airspace System. ACRP’s NextGen initiative aims to i...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 231: Challenges to CV and AV Applications in Truck Freight Operations explores connected vehicle (CV) and automated vehicle (AV) technology, focusing on heavy trucking. The report identifies existing and emerging freight regulatory, planning, policy, and operational environments and challenges for connected and autonomous truck technologies. The report examines barriers and opportunities that the public and private ...

TRB's E-Circular 219: The U.S. Department of Transportation’s Smart City Challenge and the Federal Transit Administration’s Mobility on Demand Sandbox: Advancing Multimodal Mobility and Best Practices Workshop features presentations and dialogue from a January 8, 2017 workshop at the TRB Annual Meeting. The workshop explored the role of public transit, shared mobility, and advanced technology (including connected and automated vehicle technology, sensing, cameras, etc.) in the recent competit...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2564 consists of 15 papers that explore travel demand forecasting, including: Integration of a Capacity-Constrained Workplace Choice Model: Recent Developments and Applications with an Agent-Based Simulation in Singapore Modeling Carsharing with the Agent-Based Simulation MATSim: State of the Art, Applications, and Future Developments Microsimulation of Demand and Supply of Autonomous Mobility On Demand Tr...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2561 consists of 11 papers that explore traffic signal systems, including: Hybrid Multimodal and Intermodal Transport Simulation: Case Study on Large-Scale Evacuation Planning Effects of Autonomous Vehicle Behavior on Arterial and Freeway Networks Generalized Adaptive Smoothing Method for State Estimation of Generic Two-Dimensional Flows Getting the Human Factor into Traffic Flow Models: New Open-Source De...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2566, includes 11 papers that explore information related to travel behavior, including: Shifts in Long-Distance Travel Mode Due to Automated Vehicles: Statewide Mode-Shift Simulation Experiment and Travel Survey Analysis Longitudinal Vehicle Transaction Model: Assessment of Lead and Lagged Effects of Longer-Term Changes and Life-Cycle Events Perception of Mode-Specific Travel Time Reliability and Crowding...

The full edition of the TR News is now available. The July-August 2016 edition addresses key issues in aviation: the workforce of the future—the needs to be filled and the sources of personnel; addressing the challenges of civil aviation safety; airline consolidation, competition, and the evolution of air service; optimizing cybersecurity for commercial aviation; the operation of unmanned aircraft in the National Airspace System; aviation’s evolving role in a changing climate; airports and tr...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2559, includes 15 papers that explore information related to intelligent transportation systems, including: National Survey Identifying Gaps in Consumer Knowledge of Advanced Vehicle Safety Systems Capturing the Benefits of a Variable Advisory Speed System in Portland, Oregon: Empirical Before and After Evaluation Lane Departure Warning and Prevention Systems in the U.S. Vehicle Fleet: Influence of Roadway...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2558 consists of 9 papers that explore traffic signal systems, including: Arterial Progression Optimization Using OD-BAND: Case Study and Extensions Connected Vehicle–Based Adaptive Signal Control and Applications Managing User Delay with a Focus on Pedestrian Operations Automated Turning Movement Counts for Shared Lanes: Leveraging Vehicle Detection Data Use of High-Resolution Signal Controller Data to Id...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2542 consists of 14 papers that explore public transportation, including: Transportation Issues of Adults on the Autism Spectrum: Findings from Focus Group Discussions Travel Patterns, Needs, and Barriers of Adults with Autism Spectrum Disorder: Report from a Survey Shaping the New Future of Paratransit: An Agenda for Research and Practice Automated Sidewalk Assessment Method for Americans with Disabilitie...

TRB's Airport Cooperative Research Program (ACRP) Report 150: NextGen for Airports, Volume 3: Resources for Airports presents an overview of the many elements of NextGen, in terms and context that are relevant, familiar, and understandable to airport operators. This guide and associated primer broadly address potential airport impacts and include background information so that airport personnel can discern which NextGen programs will impact them and how. The report includes a list of NextGen ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2584 consists of 12 papers that explore safety issues in transportation, including: Evaluation of Intersection Confirmation Lights with Targeted Enforcement to Reduce Red Light Running Violations at Freeway Ramp Intersections Making Use of Big Data to Evaluate the Effectiveness of Selective Law Enforcement in Reducing Crashes Impact of Red Light Enforcement Cameras on Safety Performance at Signalized Inter...

TRB’s Airport Cooperative Research Program (ACRP) Report 150: NextGen for Airports, Volume 4: Leveraging NextGen Spatial Data to Benefit Airports: Guidebook provides information for airport operators on the benefits to airports associated with the creation, maintenance, and use of spatial data that is generated in conjunction with NextGen initiatives. The guidebook also describes costs, and financial and legal considerations of this data. In addition to the guidebook, a PowerPoint presentatio...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2539 consists of 10 papers that explore public transportation, including: Modeling Fuel Consumption of Hybrid Electric Buses: Model Development and Comparison with Conventional Buses Use of Real-Time Operational Tactics to Synchronize Transfers in Headway-Based Public Transport Service Estimation of Short-Term Bus Travel Time by Using Low-Resolution Automated Vehicle Location Data Application of Bus-Only L...

TRB's Airport Cooperative Research Program (ACRP) Report 150: NextGen for Airports, Volume 2: Engaging Airport Stakeholders: Guidebook helps airports engage the U.S. Federal Aviation Administration (FAA), aircraft operators, community representatives, and other airport stakeholders during the planning, environmental review, design, deployment, and monitoring phases of NextGen implementation. The guidance references a NextGen Outreach Toolkit, which contain videos, an interactive flow chart, a...

The full edition of TR News March-April 2016 has been released. This edition documents an array of sessions, workshops, events, interactions, exchanges, awards, and more at TRB's 2016 Annual Meeting in Washington, D.C. Feature articles present transportation-related findings from a series of policy studies by the National Academies of Sciences, Engineering, and Medicine on the global connection to changes in the Arctic; plus results from research projects on sustainability as an organizi...

TRB's Airport Cooperative Research Program (ACRP) Report 150: NextGen for Airports, Volume I: Understanding the Airport’s Role in Performance-Based Navigation: Resource Guide, the first report in this series, provides comprehensive information to practitioners concerning all aspects of Performance-Based Navigation (PBN) and how implementation affects overall airport operations. This Resource Guide encompasses background information, description of effects on short- and long-term airport devel...

TRB's E-Circular 210: Multimobility and Sharing Economy: Shaping the Future Market Through Policy and Research Multimodal explores the results of a workshop that focused on new developments in the shared-mobility sphere, the use of smartphones in pushing the goal of shared mobility forward, and on rural and suburban mobility problems. It also raised the issue of equity for paratransit options in relation to innovative transportation modes and touched on strategies that could foster an environ...

TRB's Protection of Transportation Infrastructure from Cyber Attacks: A Primer provides transportation organizations with reference materials concerning cybersecurity concepts, guidelines, definitions, and standards. The primer is a joint product of two TRB Cooperative Research Programs, and is categorized as Transit Cooperative Research Program (TCRP) Web-Only Document 67 and National Cooperative Highway Research Program (NCHRP) Web-Only Document 221. The Primer delivers strategic, managemen...

TRB's E-Circular 208: Transformational Technologies in Transportation: State of the Activities explores the status and applications of transportation goods, services, and systems that fall under the umbrella of transformational techology. Key transformational technologies include connected and automated vehicles, including shared use services; unmanned aerial systems (drones); Internet of Things (including smart cities); and cybersecurity. In addition, the following technologies that have pot...

TRB's Conference Proceedings on the Web 19: Automated and Connected Vehicles: Summary of the 9th University Transportation Centers Spotlight Conference highlights a November 4-5, 2015 conference held in Washington, D.C. on Automated and Connected Vehicles. This conference was the 9th in a series of Spotlight Conferences funded by the U.S. Department of Transportation’s (U.S. DOT) Office of the Assistant Secretary for Research and Technology (OST-R), which sponsors the University Transportatio...

A featured article in the January-February 2016 issue of the TR News explores the concerns and benefits of transformational technologies through the lens of state departments of transportation (DOTs). States are experiencing technological disruptions in every mode, and are exploring how new technologies will impact social issues, environmental issues, legal issues, and have other ramifications. The article also examines how state DOTs are planning to test and deploy automated vehicle and inte...

TRB's National Cooperative Highway Research Program (NCHRP) Legal Research Digest 69: A Look at the Legal Environment for Driverless Vehicles explores legal policy issues that may be associated with driverless vehicles. It provides an introduction to how civil and criminal liability may adhere to driverless vehicles, the implications of these vehicles for privacy and security, how these vehicles are likely to become subject to and potentially alter prevailing automobile insurance regimes, and...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2489, includes 17 papers that explore information related to intelligent transportation systems, including: In-Car Advice to Reduce Negative Effects of Phantom Traffic Jams Automatic Congestion Identification with Two-Component Mixture Models Design and Implementation of Integrated Network Management Methodology in a Regional Network Platoon-Based Speed Control Algorithm for Ecodriving at Signalized Inters...

A featured story in the November-December 2015 TR News provides an overview of the data and the tools available to researchers during the Phase 1 experimental operational period of the second Strategic Highway Research Program (SHRP 2) naturalistic driving study data. The SHRP 2 naturalistic driving, unprecedented in size and scope, has produced unparalleled data on how drivers actually drive, what they are doing just before they crash or almost crash, and how they successfully avoid incident...

TRB Special Report 319: Between Public and Private Mobility: Examining the Rise of Technology-Enabled Transportation Services analyzes how innovative transportation services, including ridesharing, carsharing, bikesharing, and microtransit, are changing mobility for millions of travelers. Such services could reduce congestion and emissions from surface transportation if regulated wisely to encourage concurrent, rather than sequential, ride sharing. Rapidly growing transportation network comp...

TRB E-Circular 201: Linking the Past to the Future: Lessons from History About Emerging Technology explores the presentations made at a one-day, invitational workshop that took place on June 13, 2014 and was hosted by the Intelligent Transportation Systems Joint Program Office (JPO) of the U.S. Department of Transportation and the History Committee of the Transportation Research Board. The workshop explored how technology can be enhanced by an understanding of the social and institutional asp...

TRB’s Airport Cooperative Research Program (ACRP) Report 146: Commercial Ground Transportation at Airports: Best Practices covers best management practices to ensure the provision of safe, comfortable, easy-to-use, and efficient commercial ground transportation service. Commercial ground transportation services include taxicabs, limousines, shared-ride services, transportation network companies, courtesy vehicles, buses, and vans. The guidebook reviews the ground transportation industry, pote...

TRB’s Transportation Research Record (TRR): Journal of the Transportation Research Board, No. 2487 consists of 10 papers that address traffic signal systems, including: Emission-Based Signal Timing Optimization for Isolated Intersections Sequence Optimization at Signalized Diamond Interchanges Using High-Resolution Event-Based Data Performance Measures for Optimizing Diverging Interchanges and Outcome Assessment with Drone Video Performance Ranking of Arterial Corridors Using Travel Time and ...

TRB’s Airport Cooperative Research Program (ACRP) Report 144: Unmanned Aircraft Systems (UAS) at Airports: A Primer provides airports of all sizes with information about unmanned aircraft systems (UAS) and their potential use and impact on airports. The report includes a glossary of key terms, a background on the current state of UAS operations, UAS costs and benefits to airports, regulatory and community considerations, UAS infrastructure and operational considerations, UAS safety and securi...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2536 explores 12 papers related to paratransit and emerging technologies in the public transportation sector, including: Implementing Mobility as a Service: Challenges in Integrating User, Commercial, and Societal Perspectives Carsharing Demand Estimation: Zurich, Switzerland, Area Case Study Integrated Relocation Model for Free-Floating Carsharing Systems: Field Trial Results What About Free-Floating Cars...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2479 consists of 11 papers covering the following topics relating to marine transportation, port operations, and intermodal freight: Development of the Adoption of Liquefied Natural Gas as a Fuel for Shipping on the Great Lakes Vessel Route Choice Theory and Modeling Big Data-Based Estimation for Ship Safety Distance Distribution in Port Waters Environmental Balance of Shipping Emissions Reduction Strategi...

TRB’s Airport Cooperative Research Program (ACRP) Report 140: Guidebook on Best Practices for Airport Cybersecurity provides information designed to help reduce or mitigate inherent risks of cyberattacks on technology-based systems. Traditional IT infrastructure such as servers, desktops, and network devices are covered along with increasingly sophisticated and interconnected industrial control systems, such as baggage handling, temperature control, and airfield lighting systems. The guideboo...

The latest edition of Research Pays Off explores a data analytics tool developed by the Florida Department of Transportation that combines archived intelligent transportation systems (ITS) data collected at the state’s regional transportation management centers (TMCs) with data from other sources to inform transportation planning and operation decisions. With traffic analysis, simulation modeling, data fusion and mining, and optimization, the accumulated data can support performance measureme...

On April 28, 2015, the Committee for the Review of the U.S. Department of Transportation (USDOT) Report on Connected Vehicle Initiative Communications Systems Deployment sent a letter to Anthony R. Foxx, Secretary of the USDOT. The committee, as directed by Congress, conducted an independent peer review of a draft USDOT report to Congress, Status of the Dedicated Short-Range Communications Technology and Applications . The committee agrees with the USDOT’s draft report about the benefits that...

TRB Transportation Research Record: Journal of the Transportation Research Board, No. 2460 consists of papers that address the value proposition for transportation projects; automated road travel surveys; development of alignment-based parametric data exchange schema for bridge geometry; pavement condition monitoring with crowdsourced connected vehicle data; traffic collision record mapping; a methodology to map routes from a truck permit database; and full-body occlusion handling and density...

TRB’s Transportation Research Record (TRR): Journal of the Transportation Research Board, No. 2418 consists of 15 articles that chronicles the jobs–housing balance of bus commuters in Beijing, China; an evaluation of presignals at oversaturated signalized intersections; transit signal priority with connected vehicle technology; combinatorial optimization for the Guangzhou, China bus rapid transit system; and route selection and running-time savings estimation for multiscenario all-door bus bo...

The full PDF version of the May-June TR News examines the shift in the U.S. energy outlook, including the increase in domestic natural gas production, and the implications for energy security, transportation, and climate policies. Another article describes how public–private partnerships in West Virginia are used to build roads and other facilities. A third feature identifies ten research areas to follow in the field of automated vehicle technology. Two opinion pieces offer insights on progra...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2430 consists of 23 papers that examine modeling demand for bikesharing systems; origin-destination centrality to estimate directional bicycle volumes; imputation of GPS traces forcing full or partial consistency in activity travel sequences; information diffusion in social networks toward sustainable transportation; models of nonmotorized travel demand at intersections in Calgary, Canada; and safety and s...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2423 consists of nine papers that summarize the opportunities for intelligent transportation systems in the energy arena; effects of tactile location, pulse duration, and interpulse intervals on perceived urgency; review of variable speed limits and advisories; enhanced modeling of driver stop-or-run actions at a yellow light; and combinatorial auction to allocate traffic. This issue also examines traveler...

The Transportation Research Record: Journal of the Transportation Research Board, No. 2416 includes 11 papers that explore fleet sizing for flexible carsharing systems; pilots of low-cost transit service enhancements through agency collaboration; pedicabs for urban transportation in U.S. cities; public perceptions and market characteristics of peer-to-peer carsharing in the San Francisco Bay Area, California; and a model of station-based and free-floating carsharing demand. This issue also su...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2424 consists of eight papers that address a new snapshot generation protocol for travel-time estimation in a connected vehicle environment, the safety impacts of intervehicle warning information systems for moving hazards in connected vehicle environments, near-crash identification in a connected vehicle environment, and energy consumption reduction strategies for plug-in hybrid electric vehicles with con...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2387 consists of 17 papers that explore bicycle-specific traffic signals; automated collection of cyclist data; the role of the bicycle in the limitation of transportation poverty in the Netherlands; passing events in mixed bicycle traffic; driver and cyclist education materials; and station-level forecasting of bikesharing ridership. This issue of the TRR also examines bicycle infrastructure quality-of-se...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2381 consists of 13 that explore a roadway reservation system; hazardous driving event detection and analysis systems; placement of roadside equipment for travel time estimation; modeling safe driving distance; a time-variant travel time prediction model; path clearance for emergency vehicles; a methodology for scalable dynamic vehicular ad hoc networks in a well-calibrated test bed; traffic signal control...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2356 contains 14 papers that review an intelligent dilemma-zone protection system for a high-speed rural intersection; adaptive signal control in Germany; queue length under connected vehicle technology; a coordinated optimization model for signal timings of full continuous flow intersections; and, transit priority strategies for multiple routes under headway-based operations. This TRR also explores multir...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2359 contains 10 papers that address parking patrol surveys; smart parking systems; parking at sporting event stadiums; parking utilization in neighborhood shopping centers on transit routes; and cost-effectiveness of traffic and demand management measures. This TRR also examines dynamic ridesharing systems; dynamic vehicle allocation for carsharing systems; travel behavior of carsharing members; residenti...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2380 consists of 12 papers that explore the relationship between application scale and maximum time latency; arterial traffic flow; U.S.-Mexican land border crossings; work zone information systems; real-time detection and tracking of traffic shock waves; and a variable speed limit system on a German Autobahn.  This issue of the TRR also examines dynamic speed limits on a Dutch freeway; wavelet-k near...

Photographic highlights of sessions, events, presentations, meetings, exhibits, awards, and more from TRB’s 92nd Annual Meeting—including valedictory speeches by two major transportation leaders—is accompanied in the March–April issue of TR News by feature articles on the promise of connected vehicle technology; the accomplishments and vision of more than two decades of TransTech Academy, preparing urban students for careers in transportation; and practical insights from TRB’s first-ever virt...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2324 consists of 15 papers that explore intervehicle safety warning information systems; travel time prediction; intersection decision support in adverse weather conditions; creation of CityMobil; real-time freeway end-of-queue alerting systems; traffic incident detection; vehicle class-specific route guidance; cooperative adaptive cruise control; dynamic parking guidance; vehicle platoon control; advanced...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2319 consists of 13 papers that explore parking modeling and pricing; parking at affordable housing; equity implications of parking taxes; model for parking decisions; agent-based parking choice models; standard performance measures for transportation demand management programs; how employers view traffic congestion; changes in drive-alone commute and vehicle miles traveled during temporary freeway closure...

TRB’s Airport Cooperative Research Program (ACRP) Report 70: Guidebook for Implementing Intelligent Transportation Systems Elements to Improve Airport Traveler Access Information provides descriptions, component details, and examples of how airport ground access information can be disseminated using various intelligent transportation systems (ITS) technologies. The guidebook contains tables to help airport operators determine the applicability of certain ITS strategies based on airport operat...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2243 consists of 18 papers that explore reidentification of trucks over long distances, lane-level travel times, private-sector probe-based speed data in the planning processes, travel time estimation enhancement, sustainable urban transport, university students’ acquisition and use of travel information, integration of variable speed limit control and travel time estimation, vehicle-to-infrastructure traf...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2189 contains 12 papers that explore real-time parking information, capability-enhanced probe vehicle surveillance system with vehicle-to-vehicle communications, in-vehicle and infrastructure-based collision warnings to nonviolating drivers, emergency response technology and an integrated active transportation system, and a rural variable speed limit system. This issue of the TRR also examines intelligent ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2161 includes six papers that explore a lane-changing model based on driver behavior, a lane-changing model of multiclass vehicles under heavy traffic conditions, simulation-based traffic prediction for incident management, traffic simulation using data archives of intelligent transportation systems, the macroscopic fundamental diagram using simulation data, and ex post evaluation of calibrated simulation ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2129 includes 17 papers that explore vehicle reidentification algorithms, privacy preservation in intelligent transportation systems and the vehicle–infrastructure integration initiative, advanced traveler information systems deployment, dynamic message sign deployment and traveler diversion behavior, real-time detection of hazardous traffic events on freeways, and an automatic traffic conflict detection s...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2086 includes 16 papers that explore cell phone traffic data, real-time vehicle classification using inductive loop signature data, vehicle detection in far field of view of video sequences, vision-based speed sensing, increasing the value of intelligent transportation systems, and benefits and costs of advanced traffic management components.  This issue of the TRR also examines traveler inform...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2065 includes 8 papers that explores a new active traffic management approach for metropolitan freeways; an innovative approach to statewide sketch planning for traffic operations in Wisconsin; intermediate access to buffer-separated managed lanes; and dual-system urban interchange design.  This issue of the TRR also examines high-occupancy toll lanes and public transportation; automated vehicl...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, 2047 includes 12 papers that explore the capacity and performance implications of ramp closure, traffic diversion rates due to changeable message sign messages, safety service patrol programs return on investment, ramp metering policies, variable speed limit effect on traffic flow, and intelligent transportation system impact on queue discharge flow variability.  This issue of the TRR also examines...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2044 includes 13 papers that explore relating cost to condition in highway maintenance, a sampling procedure for road maintenance evaluations, and shaping the future of the workforce for intelligent transportation systems.  This issue of the TRR also examines bridge inspection in Europe; bridge deck assessment by ground-penetrating radar, chain drag, and ground truth; electrical injection of co...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements explores the development of accident modification factors (AMFs) for traffic engineering and intelligent transportation system improvements. AMFs, also known as crash reduction factors, are designed to provide a simple and quick way of estimating the safety impacts of various types of engineering improvements, encompassing the areas of signi...

TRB’s Transit Cooperative Research Program (TCRP) Report 126: Leveraging ITS Data for Transit Market Research: A Practitioner’s Guidebook examines intelligent transportation systems (ITS) and Transit ITS technologies currently in use, explores their potential to provide market research data, and presents methods for collecting and analyzing these data.  The guidebook also highlights three case studies that illustrate how ITS data have been used to improve market research pra...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 118, Part II: Incorporating ITS Into the Transportation Planning Process: An Integrated Planning Framework (ITS, M&O, Infrastructure) Practitioner’s Guidebook explores factors that are pushing regions and states towards integration of intelligent transportation systems in the transportation planning process, including the institutional, organizational, and technical processes that are included within it.  ...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 118, Part I: Incorporating ITS Into the Transportation Planning Process: An Integrated Planning Framework (ITS, M&O, Infrastructure) Executive Guidebook explores factors that are pushing regions and states towards integration of intelligent transportation systems in the transportation planning process, including the institutional, organizational, and technical processes that are included within it.  In add...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2022 includes 11 papers that explore emergency resource allocation for critical transportation infrastructure protection, intelligent transportation system networks survivability, information sharing during emergency response and recovery, multiple hazards protective measures, and the spatiotemporal model for infrastructure reconstruction following a large-scale disaster.  This issue of the TRR...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2015 includes 15 papers explore issues related to work zones such as speed-activated signs, a variable advisory speed limit system, the use of drone radar, sequential portable changeable message signs, alternative dates for advance notification on portable changeable message signs, worker safety, nighttime construction work zone devices, and crashes.  This issue of the TRR also examines pavemen...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2000 includes 15 papers that explore intelligent transportation systems (ITS) for road operation in high wind conditions, Monte Carlo simulation of intervehicle communication, extending adaptive cruise control, variable message sign benefit limits, vehicle infrastructure integration (VII)-enabled traffic monitoring, and urban expressway–arterial corridor on-line control system.  This issu...

TRB’s Committee for a Study of Options for Streamlining Standards for Intelligent Transportation Systems has delivered a letter report to Ms. Shelley Row, director of the U.S. Department of Transportation’s (USDOT’s) ITS Joint Program Office.  The letter report examines the federal role in developing and deploying ITS standards.  It recommends that USDOT continue to play a prominent role in support of ITS standards but one that is guided by a well-articulated strategic vision and p...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 1944 explores intelligent transportation systems and vehicle-highway automation. Specific topics examined include collision avoidance systems, intersection decision support systems, intelligent vehicle control systems, advanced traveler information systems, route guidance, a new m-commerce parking system, travel time estimation techniques, a mode-based approach to extracting roadway background image...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 1935 examines a pilot study to help engineers and operators make decisions for a network of toll roads, an advanced imputation method to address the problem of incomplete data on intelligent transportation systems, a multiobjective ant algorithm for the siting of emergency service facilities, and more. Individual TRR Journals, which are published on an irregular basis throughout the year, consist of...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 560: Guide to Contracting ITS Projects provides guidance on the procurement of intelligent transportation systems (ITS), including variable message signs, traffic detectors, signal controllers, and a variety of other hardware and software that entails applications of advanced electronics and information management to regulate and facilitate traffic flow.  The report highlights best practices and recommends contracting st...

TRB’s Transportation Research Record: Journal of the Transportation Research Board No. 1924 explores ways that intelligent transportation devices—such as signs and ramp meters—could help older drivers use freeways; assesses the potential demand for new academic programs in transportation and logistics in Rhode Island; examines whether transport megaprojects in Hong Kong and China could be designed to benefit local areas as well as global interests; and reveals how improveme...

TRB’s Transportation Research Circular E-C092, Maintenance and Operations of Transportation Facilities: 2005 Strategic Vision explores the major trends that affect maintenance; cites current and emerging innovations in management systems, technology, and intelligent transportation systems; and examines some of the key maintenance challenges of this century.  

TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 299—Crash Reduction Factors for Traffic Engineering and Intelligent Transportation System (ITS) Improvements: State-of-Knowledge Report summarizes the current status of crash reduction factors for a variety of treatments and provides a summary of the “best available” crash reduction factors.  The report also reviews the relationship between NCHRP Project 17-25, “Crash Reduction Factors for Traffic Engine...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 1910 examines the design of alert criteria for an intersection decision support system; a probabilistic approach for validation of advanced driver assistance systems; effective and sustainable development of the Chinese national intelligent transportation system architecture; approaches for introducing intelligent transportation systems into developing countries; and the upstream and downstream traf...

TRB’s Transit Cooperative Research Program (TCRP) Report 84: e-Transit: Electronic Business Strategies for Public Transportation Volume 6, Strategies to Expand and Improve Deployment of ITS in Rural Transit Systems examines Internet and communication technologies that are being deployed at rural transit agencies. The report provides information on statewide intelligent transportation systems (ITS) plans that include provisions for rural ITS initiatives. The declining costs of communications,...

The March-April 2005 issue of TR News includes the following articles: School Transportation: Improving the Safety, Security, and Quality of Student Travel Neighborhood Schools and Sidewalk Connections: What Are the Impacts on Travel Mode Choice and Vehicle Emissions? The Dynamics of School Location and School Transportation: Illustrated with the Dutch Town of Zwijndrecht Automated Vehicle Location for School Buses: Can the Benefits Influence Choice of Mode for School Trips? How Risky Is the...

TRB’s Transportation Research Record: Journal of the Transportation Research Board 1887 presents case studies of Chicago’s regional transit program for welfare to work, the development of the Bay Area Rapid Transit system expansion criteria and process, the estimation of statewide urban public transit benefits in Tennessee, the travel demand and car ownership impacts of City CarShare in San Francisco, transit customer response to intelligent transportation system technologies in ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board 1886 examines the deployment of intelligent transportation systems in countries with developing and transitional economies; the parking guidance system in San Jose, California; emergency evacuation planning with microscopic traffic simulation; the south Jersey real-time motorist information system; and data requirements for enhanced digital maps in an advanced curve-speed warning system. Individual TRR J...

The January-February 2004 issue of TR News includes the following articles: Go Light with the Salt, Please: Developing Information Systems for Winter Roadway Safety Planning the Road Ahead with Market Research: Transportation Agencies Stay in Gear with Customers, Resources, and Performance Measures Transportation Agencies Meet Fiscal Challenges: The Transportation Research Board’s 2003 Field Visit Program Cybersecurity of Freight Information Systems: A Scoping Study “Analyze This!” -- Taking...

TRB Special Report 280: Development and Deployment of Standards for Intelligent Transportation Systems (ITS): Review of the Federal Program presents recommendations for future management of the Federal Highway Administration’s ITS Standards Program. A summary of Special Report 280 as published in the January-February 2005 issue of TR News is available.

A December 4, 2003, letter report from TRB’s Research and Technology Coordinating Committee to the Federal Highway Administration (FHWA) covers local/regional stakeholder involvement in highway research and technology programs, the Department of Transportation’s intelligent transportation systems program, the research activities of the Office of Operations, the status of implementation efforts for the FHWA’s corporate master plan for highway research and technology, and plans for an assessmen...

TRB's Transportation Research Record: Journal of the Transportation Research Board 1840 covers empirical approaches to outlier detection in intelligent transportation systems data, modeling of traffic crash-flow relationships for intersections, profiling of high-frequency accident locations by use of association rules, analysis of rollovers and injuries with sport utility vehicles, and automated accident detection at intersections via digital audio signal processing. Individual TRR Journals,...

TRB’s Transportation Research Record: Journal of the Transportation Research Board 1836 includes information on the uses of light detection and ranging technology to speed up highway location and design activities (in conjunction with photogrammetric mapping) and to collect highway intersection safety information. Also examined are approaches to optimize traffic information services and short-term traffic prediction, as well as methods to store and retrieve intelligent transportation system d...

Transportation Research Record: Journal of the Transportation Research Board 1826 examines the potential for high-tech, time-efficient methods of highway travel, including an assessment of an advanced traveler information system in Washington, D.C., and an evaluation of the California plan for statewide Intelligent Transportation Systems. This issue also explores the tracking of anonymous vehicles for real-time traffic surveillance and performance, and the development of an in-vehicle dilemma...

The TRB Committee for Review of the U. S. Department of Transportation's (DOT) Intelligent Transportation Systems (ITS) Standards Program has issued its fourth letter report to the ITS Joint Program Office. The report concludes that facilitating ITS data harmonization warrants JPO support.

TRB Special Report 274 - Cybersecurity of Freight Information Systems: A Scoping Study reviews trends in the use of information technology in the freight transportation industry and assesses potential vulnerabilities to a cyberattack.

The March-April 2003 issue of TR News includes the following articles: "Rural Passenger Transportation," "The Changing Demographics of Rural America: What Are the Implications for Transportation Providers?," "Intelligent Transportation Systems for Rural Transit: Not Just for Urban Systems Anymore," " The Trip to Town: Rural Transportation Patterns and Developments Since 1900 ," and "Intercity Bus Links: Moving into New Territory" are among th...

Transportation Research Record 1804 considers travel-time estimates obtained from intelligent transportation systems and instrumented test vehicles, the cleaning of matched license plate data, design characteristics of national travel surveys, spatial behavioral data, and techniques for building multijurisdictional geographic information system platforms for transportation analysis. Abstracts of papers that make up this TRR are available through TRB's Publication Index. In the Series field ty...

Transportation Research Record 1800 covers the intertechnology effects in intelligent transportation systems, a genetic algorithm-based optimization approach and generic tool for calibrating traffic microscopic simulation parameters, transmitted bandwidth and bit error probability of safety warning systems, functional requirements for an in-vehicle dilemma zone warning system at signalized intersections, and the effects of adaptive cruise control systems on highway traffic flow capacity. Abst...

"Intelligent Transportation Systems: Making Inroads," "Introducing Intelligent Transportation Systems: Paradigm for 21st Century Transportation," "Intelligent Transportation Systems at the Turning Point: Preparing for Integrated, Regional, and Market-Driven Deployment," " Security Redefines the Agenda: TRB's 2001 Field Visit Program ," and "California's Performance Measurement System: Improving Freeway Efficiency Through Transportation Intelligence" are among the articles in the January-Febr...

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 296: Impact of New Information and Communication Technologies on Transportation Agencies examines the impact that information and communication (I/C) technologies are having on transportation agencies and offers data to understand how agencies are dealing with these impacts. Four classes of technologies were examined: intelligent transportation systems, communication technology, software tools, and remote work arrangements.

This Intelligent Transportation Systems (ITS) Innovations Deserving Exploratory Analysis (IDEA) project explored the feasibility of a flash flood warning system for motorists on the road. A system with a modular design was proposed to allow flexibility in technology implementation and its components or subsystems were identified. These included water level sensors, data processing subsystem, data dissemination subsystem, alerting subsystem, monitoring subsystem, motorist warning subsystem, tr...

This Intelligent Transportation Systems (ITS) Innovations Deserving Exploratory Analysis (IDEA) project evaluated ITS technologies to help snowplow drivers operate safely and efficiently in low visibility conditions. Two ITS technologies were evaluated: a lateral guidance system (LGS) developed by 3M and a collision warning system (CWS) developed by Altra Technologies. The LGS consisted of a magnetic pavement marking tape that was installed in Minnesota Highway 19. The CWS used a radar around...

The objective of this Intelligent Transportation Systems (ITS) Innovations Deserving Exploratory Analysis (IDEA) project was the development of a new technology for ranging sensors called IRIS (Intelligent Ranging with Infrared Sensors). This technology has the potential to produce a new generation of sensors with significantly lower cost and substantially increased accuracy and reliability than any of the technologies available today. Such sensors would be useful in almost every aspect of IT...

TRB’s Transit Cooperative Research Program (TCRP) Research Results Digest 31: International Transit Studies Program, Report on the Fall 1997 Mission: Applications of Intelligent Transportation Systems to Public Transit in Europe summarizes the seventh mission performed under TCRP Project J-3, "International Transit Studies Program " The report includes information on the cities visited and the lessons learned and discusses policies and practices that could be used in the United States.

TRB's Transit Cooperative Reserach Program (TCRP) Synthesis 24: AVL Systems for Bus Transit examines various aspects of developing and deploying automated vehicle location (AVL) systems over the last 20 years.  Current practice; AVL architecture and technologies; and the institutional context of AVL defined in terms of funding, justification, staffing, and procurement are explored.