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 administrative issues that should be considered. The contractor’s final report providing background information f...

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-notice” emergency events. The report follows the basic planning steps of the Federal Emergency Management Agency’s...

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 Warrants for Unsignalized Intersections provides background on the development of NCHRP Report 745.

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 projects using fuel price indices or fuel prices. Appendixes B, C, and D were not includedin the print or PDF v...

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 as a tool that can be used in conjunction with other planning methods to improve the quality of long-range tran...

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 girders and decks. The proposed specifications are designed to help highway agencies evaluate between comparable de...

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 (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, describes the decision making framework used to select specific VIA techniques for a given project, includes VIA b...

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 models; identifies potential approaches to develop and apply freight trip generation models; and estimates establ...

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 series of rural typology variables considered in stratifying model parameters and benchmarks and identifies the s...