TRB’s National Cooperative Highway Research Program (NCHRP) Report 750: Strategic Issues Facing Transportation, Volume 1: Scenario Planning for Freight Transportation Infrastructure Investment analyzes the driving forces behind high-impact economic and social changes as well as sourcing patterns that may affect the U.S. freight transportation system. The report also introduces scenario planning...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 746: Traffic Enforcement Strategies for Work Zones presents guidance for the safe and effective deployment of traffic enforcement strategies in work zones on high-speed highways (those with speed limits of 45 mph or greater). The report discusses the planning, design, and operation of traffic enforcement strategies, as well as a...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 745: Left-Turn Accommodations at Unsignalized Intersections presents guidance for the selection and design of left-turn accommodations at unsignalized intersections. The report includes 11 case studies of typical situations that illustrate the use of the guidance. NCHRP Web-Only Document 193 : Development of Left-Turn Lane Warra...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 744: Fuel Usage Factors in Highway and Bridge Construction includes fuel usage factors for work items in the construction and maintenance of highways and bridges. The report includes the Price Adjustment Calculator Tool, a Microsoft Excel® spreadsheet, designed to assist in the calculation of payment adjustments for construction...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 743: Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality describes a laboratory test method to predict the initial retroreflectivity of pavement markings in the field based on the quality of the applied glass beads.

TRB’s National Cooperative Highway Research Program Report 742: Communicating the Value of Preservation: A Playbook presents guidance for communicating the value of highway system maintenance and preservation. The report includes numerous examples and models that transportation agency staff members can use to present to agency leadership, elected officials, and the public to make the case ...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 741: Evaluation of Methodologies for Visual Impact Assessments evaluates visual impact assessment (VIA) procedures, methods, and practices that satisfy or exceed National Environmental Policy Act (NEPA) and other requirements. The report documents VIA methodologies and approaches used in the United States and other countries, de...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 740: A Transportation Guide for All-Hazards Emergency Evacuation focuses on the transportation aspects of evacuation, particularly large-scale, multijurisdictional evacuation. The guidance, strategies, and tools in NCHRP Report 740 are based on an all-hazards approach that has applicability to a wide range of “notice” and “no-no...

TRB joint National Cooperative Highway Research Program (NCHRP) Report 739/National Cooperative Freight Research Program (NCFRP) Report 19: Freight Trip Generation and Land Use explores the relationship between freight trip generation and land use. The report consolidates available freight trip generation models in an  electronic database to assist practitioners interested in using these m...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 737: Design Guidance for High-Speed to Low-Speed Transitions Zones for Rural Highways presents guidance for designing the transition from a high-speed rural highway to a lower-speed section, typically approaching a small town. The report includes a methodology for assessing these highway sections and a catalog of potential treat...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 736: Resource Allocation Logic Framework to Meet Highway Asset Preservation presents a logic framework for allocating limited highway asset preservation funds among competing demands in order to help maximize system performance. The report also presents a spreadsheet-based computational tool that implements the framework. Protot...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 735: Long-Distance and Rural Travel Transferable Parameters for Statewide Travel Forecasting Models explores transferable parameters for long-distance and rural trip-making for statewide models. Appendixes G, H, and I are not contained in print or PDF versions of the report but are available online.  Appendix G presents a s...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 734: Hydraulic Loss Coefficients for Culverts explores culvert designs that maintain natural velocities and minimize turbulence to allow migratory species to pass through the culvert barrel. The report describes the refinement of existing hydraulic relationships and the development of new ones for analysis and design of culverts...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 733: High-Performance/High-Strength Lightweight Concrete for Bridge Girders and Decks presents proposed changes to the American Association of State Highway and Transportation Officials’ Load and Resistance Factor Design (LRFD) bridge design and construction specifications to address the use of lightweight concrete in bridge gir...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 732: Methodologies to Estimate the Economic Impacts of Disruptions to the Goods Movement System describes the impacts of bottlenecks and interruptions to the flow of goods through the nation’s major freight corridors and intermodal connectors, the dynamics of that flow in response to disruptions, and the full economic impact on ...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 731: Guidelines for Timing Yellow and All-Red Intervals at Signalized Intersections offers guidance for yellow change and all-red clearance intervals at signalized intersections. The guidelines provide a framework that can be easily applied by state and local transportation agencies.

TRB’s National Cooperative Highway Research Program (NCHRP) Report 730: Design Guidance for Freeway Mainline Ramp Terminals presents design guidance for freeway mainline ramp terminals based on current driver and vehicle behavior. Appendixes A to D to NCHRP Report 730 were not published as part of the print or PDF version of the report. They are only available electronically through the followi...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 729: Automated Enforcement for Speeding and Red Light Running includes guidelines designed to help transportation agencies start-up and operate automated enforcement programs to improve highway safety by reducing speeding and red light running. Appendices A through G to NCHRP Report 729  are available in electronic versions...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 728: Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-Urban Areas provides guidelines to evaluate and select hydraulic modifications to existing drainage infrastructure that will help mitigate potential impacts of highway runoff on receiving water...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 727: Effective Experiment Design and Data Analysis in Transportation Research describes the factors that may be considered in designing experiments and presents 21 typical transportation examples illustrating the experiment design process, including selection of appropriate statistical tests. The report is a companion to NCHRP C...