TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 188: Survey of State Funding for Public Transportation—Ways to Improve It includes suggestions on ways to potentially improve the Survey of State Funding for Public Transportation. Areas covered by the report include definition of major terms, post-submission data checks, improved accessibility, non-transit related fe...

Roundabouts have seen unprecedented growth across the United States, from just a handful a decade ago to more than 2,000 and counting. National guidance had to keep pace with the needs of states and communities planning and implementing roundabouts, and NCHRP took a lead role.

In regions across the nation, bridge engineers know that the next major seismic event is coming—maybe tomorrow, maybe centuries from now. DOTs have the critical charge of designing for earthquakes and protecting the lives of travelers.

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-S01A-RW-1: Development of Analysis Methods Using Recent Data introduces an approach to microscopic or individual event modeling of crash-related events, where driver actions, initial speeds, and vehicle locations are treated as inputs to a physical model describing vehicle motion. The report also illustrates how a trajectory mod...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2256 consists of 22 papers that explore network stratification method by travel time variation, license plate image binarization, centrality characteristics of road network patterns, commuting mode share, optimal paths in a public transit network, estimating route choice and travel time reliability, travel t...

TRB Transportation Research Record: Journal of the Transportation Research Board, No. 2237 consists of 17 papers that address analysis of crash rates and surrogate events, aggregating indicators of traffic conflict, optimizing investments in local rural road networks, improved time-to-collision definition, mining microscopic data of vehicle conflicts and collisions, arterial signal coordination...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2241 consists of 13 papers that explore highway safety metrics implementation and evaluation, levels of safety at freeway exits, calibration of Highway Safety Manual predictive models, estimating crash modification factors for daytime versus nighttime work zones, and an evaluation of the Texas Department of ...

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, in...

TRB’s Airport Cooperative Research Program (ACRP) Report 59: Information Technology Systems at Airports--A Primer is designed to help facilitate mutual understanding between airport executives and information technology (IT) professionals to enable them to work together effectively on IT projects. One of the goals of the report is to help airports achieve better performance and reliability of I...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2236 consists of 13 papers that explore measuring the influence of accessibility on accident severity; relation of flow, speed, and density of urban freeways to functional form of a safety performance function; the effects of mobile phone use on accident risk; separation of safety effects of multiple improve...

TRB’s Innovations Deserving Exploratory Analysis (IDEA) Final Report for Transit IDEA Project 58: Google Transit Data Tool for Small Transit Agencies discusses the process, results, and work effort carried out in creating a tool to have transit information such as routes, start and stop times, trips, fares, and schedules accessible online via Google Transit.

TRB’s National Cooperative Highway Research Program (NCHRP) Report 706: Uses of Risk Management and Data Management to Support Target-Setting for Performance-Based Resource Allocation by Transportation Agencies describes how transportation agencies can use risk management and data management to support management target-setting for performance-based resource allocation. As the final product of ...

TRB’s Transit Cooperative Research Program (TCRP) Synthesis 91: Use and Deployment of Mobile Device Technology for Real-Time Transit Information examines the use and deployment of real-time transit information on mobile devices. The report explores the underlying technology required to generate the information to be disseminated, the mobile technology used for dissemination, the characteristics...

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-SO1E-RW-1: Evaluation of Data Needs, Crash Surrogates, and Analysis Methods to Address Lane Departure Research Questions Using Naturalistic Driving Study Data examines the statistical relationship between surrogate measures of collisions (conflicts, critical incidents, near collisions, or roadside encroachment) and actual collis...

TRB’s National Cooperative Highway Research Program (NCHRP) Web Only Document 179: Procedures for Verification and Validation of Computer Simulations Used for Roadside Safety Applications explores verification and validation procedures, quantifiable evaluation metrics, and acceptance criteria for roadside safety research that maximize the accuracy and utility of using finite element simulations.

TRB's Transportation Research E-Circular E-C158: Commodity Flow Survey Workshop is the proceedings of a November 2010 workshop that explored the next application of the Commodity Flow Survey (CFS). The CFS is a key data source for a myriad of freight planning activities.

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 180: Producing Transportation Data Products from the American Community Survey That Comply With Disclosure Rules explores approaches to apply data perturbation techniques that will provide Census Transportation Planning Products data users complete tables that are accurate enough to support transportation planning app...

TRB’s Transportation Research Record, Journal of the Transportation Research Board, No. 2215 includes 12 papers that examine integrated real-time transit information and multimodal trip planning; an enterprise information management system for transportation right-of-way activities; real-time decision support on arterial networks; data sharing, visualization, modeling, and analysis; and the int...

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-L10-RR-1: Feasibility of Using In-Vehicle Video Data to Explore How to Modify Driver Behavior That Causes Nonrecurring Congestion presents findings on the feasibility of using existing in-vehicle data sets, collected in naturalistic driving settings, to make inferences about the relationship between observed driver behavior and ...

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-S03-RW-1: Roadway Measurement System Evaluation documents the evaluation of automated, mobile data-collection services to provide data on roadway features and characteristics considered important for safety analysis, especially analysis of data from the SHRP 2 Naturalistic Driving Study. This report is only available in electron...

TRB’s Transit Cooperative Research Program (TCRP) Synthesis 90: Video Surveillance Uses by Rail Transit Agencies explores the current use of electronic video surveillance technology solely by passenger rail agencies onboard railcars, along rights-of-way, and more.

TRB’s Transit Cooperative Research Program (TCRP) Report 84, e-Transit: Electronic Business Strategies for Public Transportation, Volume 9, Transit Enterprise Architecture and Planning Framework presents multi-faceted methods, tools, and examples within a framework to help transit agencies successfully implement technologies. The report describes the connections between a transit agency’s busin...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 695: Guide for Implementing a Geospatially Enabled Enterprise-wide Information Management System for Transportation Agency Real Estate Offices provides guidance for right-of-way offices in implementing a geospatially enabled enterprise-wide information management system and includes a logical model to assist with this implementa...

TRB’s Transportation Research E-Circular E-C156: Automated Imaging Technologies for Pavement Distress Surveys documents state-of-the-art techniques and technologies in the acquisition of pavement surface images, and basic requirements needed to automatically identify and classify pavement surface distresses. The basics of film or magnetic tape–based image acquisition are presented in the circul...

TRB Special Report 304: How We Travel: A Sustainable National Program for Travel Data assesses the current state of travel data at the federal, state, and local levels and defines an achievable and sustainable travel data system that could support public and private transportation decision making. The committee that developed the report recommends the organization of a National Travel Data Prog...

TRB’s Transit Cooperative Research Program (TCRP) Legal Research Results Digest 37: Legal Arrangements for Use and Control of Real-Time Data is designed to help transit officials understand the legal options and limitations for real-time data ownership, protection, and use.

TRB Transportation Research E-Circular E-C153: Dynamic Traffic Assignment: A Primer is designed to help explain the basic concepts and definitions of dynamic traffic assignment (DTA) models and addresses the application, selection, planning, and execution of a DTA model. The report also describes the general DTA modeling procedure and modeling issues that may concern a model user.

TRB’s second Strategic Highway Research Program (SHRP 2) has released a project brief that summarizes SHRP 2 Project L13, which conducted a feasibility study to assess the technical, economic, and business aspects of developing, operating, and maintaining an archive for data from SHRP 2 Reliability and related research projects. The archive would make this data accessible to researchers and pra...

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-L13-RW-1: Requirements and Feasibility of a System for Archiving and Disseminating Data from SHRP 2 Reliability and Related Studies explores the feasibility of developing and populating an online archive for the great variety and volume of data being produced by the SHRP 2 Reliability focus area research program. The goal of the...

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 410: Freight Transportation Surveys profiles the state of the practice in methods and techniques used to survey and collect data on freight transportation. The report also examines issues, identifies gaps in knowledge, and notes areas for potential future research in the area of freight transportation systems.