TRB’s Airport Cooperative Research Program (ACRP) Report 64: Handbook for Evaluating Emissions and Costs of APUs and Alternative Systems is designed to help airports evaluate alternatives to aircraft auxiliary power units (APUs). The handbook addresses environmental impacts, costs, infrastructure and maintenance requirements, and funding options. The printed version of the handbook includes a C...

TRB’s Airport Cooperative Research Program (ACRP) Report 63: Measurement of Gaseous HAP Emissions from Idling Aircraft as a Function of Engine and Ambient Conditions is designed to help improve the assessment of hazardous air pollutants (HAP) emissions at airports based on specific aircraft operating parameters and changes in ambient conditions.

TRB has released the final version of TRB Special Report 308: The Safety Promise and Challenge of Automotive Electronics: Insights from Unintended Acceleration, which examines how the National Highway Traffic Safety Administration’s (NHTSA’s) regulatory, research, and defect investigation programs can be strengthened to meet the safety assurance and oversight challenges arising from the ex...

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.

TRB’s Conference Proceedings on the Web 5: Research on the Health and Wellness of Commercial Truck and Bus Drivers: Summary of an International Conference is the proceedings of a November 2010 conference held in Baltimore, Maryland. The proceedings highlight and document what transpired at the conference; summarize noteworthy issues and gaps in knowledge identified at the conference; and descri...

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 Transit Cooperative Research Program (TCRP) Synthesis 98: Ridesharing as a Complement to Transit explores current practices in using ridesharing to complement public transit and highlights ways to potentially enhance ridesharing and public transit.

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2265 consists of 28 papers that explore reducing side collisions of transit buses, injury risk in collisions involving buses, prevention of tractor–semitrailer rollovers, large-truck transportation alternatives, evaluating truck safety systems, factors associated with motorcycle crashes, and severity of moto...

TRB’s Airport Cooperative Research Program (ACRP) Research Results Digest 15: Use of Towbarless Tractors at Airports—Best Practices includes broad guidance designed to help enhance the safe operation of towbarless tractors (TBLTs) at airports. The report is designed to assist airports and aircraft operators in gaining a basic understanding of the training and operational issues associated with ...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a Safety Projects Brief, which summarizes the status of products being produced within the Safety area of SHRP 2. Safety research in SHRP 2 will apply advanced technologies to understand how drivers interact with and adapt to a variety of factors—the vehicle, the traffic, the roadway characteristics, traffic control...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a report that provides an analysis plan for the SHRP 2 Naturalistic Driving Study (NDS) to help guide the development of Project S08, Analysis of In-Vehicle Field Study Data and Countermeasure Implications, and to help assist researchers planning to use the SHRP 2 NDS data. This publication is only available in electronic for...

TRB’s Transit Cooperative Research Program (TCRP) Web-Only Document 53: Operation of Light Rail Transit through Ungated Crossings at Speeds over 35 MPH presents the findings of a micro-simulation modeling study that explored the impacts of higher light rail vehicle speeds on intersection safety.

TRB’s Safety Innovations Deserving Exploratory Analysis (IDEA) Final Report for Safety IDEA Project 15: Determination of Longitudinal Stress in Rails explores longitudinal stress in rails using the polarization of Rayleigh surface waves as a means to reduce buckling and fracture.

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2252 contains 19 papers that explore economic and environmental optimization of vehicle fleets, driver response to energy information feedback, California's low-carbon fuel standard, feebates and fuel economy standards, energy use for transport in 27 European Union countries through 2030, and a comparison of...

TRB’s Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 24: Distracted Driving Countermeasures for Commercial Vehicles examines driving distractions, as well as any protective (safety-enhancing) effects of particular devices. Distracted driving for commercial drivers is defined as attending to tasks not directly related to operating the vehicle.

TRB’s Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 22: Safety Management in Small Motor Carriers explores small motor carriers' strengths and weaknesses in safety management, and identifies potentially effective safety practices.

TRB’s Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 23: Operator Drug- and Alcohol-Testing Across Modes explores practices used to deter drug and alcohol use among operators within the U.S. Department of Transportation’s (DOT’s) regulated community. The report includes a brief history of the transportation workplace drug- and alcohol-testing program, the general approach,...

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 Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 20: Potential Safety Benefits of Motor Carrier Operational Efficiencies addresses risk avoidance strategies and highlights their use and perceived safety effects. The report is designed to assist motor carriers in deploying their vehicles in ways that may minimize crash risk.

TRB’s second Strategic Highway Research Program (SHRP 2) has released a project brief that provides a snapshot of SHRP 2 progress. Since its authorization in 2005, 50 pilot tests and field demonstrations have been undertaken in 24 states, 35 documents have been published, data are being collected from nearly 1000 cars in the naturalistic driving study, and five invitational work sessi...

TRB Special Report 307: Policy Options for Reducing Energy Use and Greenhouse Gas Emissions from U.S. Transportation examines the potential for policies to yield major changes in transportation energy use and emissions trends by policy measures targeting cars and light trucks, medium and heavy trucks, and commercial airliners. These three modes are by far the largest users of energy by U.S...

TRB’s Transportation Research Record, Journal of the Transportation Research Board, No. 2220 includes 11 papers that explore portland cement concrete exposed to automated deicing solutions; identification and tracking of highway bridge maintenance; health monitoring of prestressing tendons in posttensioned concrete bridges; bridge maintenance in New York City, New York; multicriteria bridge man...

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 Transit Cooperative Research Program (TCRP) Report 146: Guidebook for Evaluating Fuel Choices for Post-2010 Transit Bus Procurements is designed to help those considering the deployment of, or conversion to, alternative fuel buses. The guidebook and life-cycle emissions model spreadsheet (FuelCost2) are intended to aide individuals who, while being quite knowledgeable about the transit in...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 692: Decision Making for Outsourcing and Privatization of Vehicle and Equipment Fleet Maintenance presents a framework for conducting systematic analysis and making decisions on outsourcing and privatization of vehicle and equipment fleet maintenance. The framework defines a decision process model that can be applied to a wide r...

TRB’s Transit Cooperative Research Program (TCRP) Synthesis 88: Strollers, Carts, and Other Large Items on Buses and Trains documents the state of the practice of transit agencies managing capacity on vehicles carrying customers with large items. The synthesis also includes a discussion of vehicle designs to accommodate these various large items.

TRB’s Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 19: Effects of Psychoactive Chemicals on Commercial Driver Health and Performance: Stimulants, Hypnotics, Nutritional, and Other Supplements identifies available information and research gaps relating to the use of chemical substances by commercial drivers and is intended to provide up-to-date information to inform decis...

TRB’s Airport Cooperative Research Program (ACRP) Report 46: Handbook for Analyzing the Costs and Benefits of Alternative Aviation Turbine Engine Fuels at Airports consists of the Alternative Fuel Investigation Tool (AFIT), a handbook on the use of AFIT, and a report on its development. AFIT is an analytical model designed to help airport operators and fuel suppliers evaluate the costs associat...

TRB’s Hazardous Materials Cooperative Research Program (HMCRP) Report 4: Emerging Technologies Applicable to Hazardous Materials Transportation Safety and Security explores near-term (less than 5 years) and longer-term (5–10 years) technologies that are candidates for enhancing the safety and security of hazardous materials transportation for use by shippers, carriers, emergency responders, or ...