TRB’s National Cooperative Highway Research Program (NCHRP) Report 778: Bridge Stormwater Runoff Analysis and Treatment Options presents information and an analysis process for identifying cost-effective, pollution-reducing strategies for management of stormwater runoff from highway bridges. Five spreadsheet analysis tools accompany the report: NCHRP Bioretention Evaluation Tool NCHRP Dry Deten...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 765: Analytical Travel Forecasting Approaches for Project-Level Planning and Design describes methods, data sources, and procedures for producing travel forecasts for highway project-level analyses. This report provides an update to NCHRP Report 255: Highway Traffic Data for Urbanized Area Project Planning and Design. In additio...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 775: Applying GPS Data to Understand Travel Behavior, Volume II: Guidelines is designed to help in using of multiple sources of Global Positioning System (GPS) data to understand travel behavior and activity. The guidelines are intended to provide a jump-start for processing GPS data for travel behavior purposes and provide key ...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 775: Applying GPS Data to Understand Travel Behavior, Volume I: Background, Methods, and Tests describes the research process that was used to develop guidelines on the use of multiple sources of Global Positioning System (GPS) data to understand travel behavior and activity. The guidelines, which are included in NCHRP Report 77...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 772: Evaluating the Performance of Corridors with Roundabouts provides measurement and evaluation methods for comparing the performance of a corridor with a functionally interdependent series of roundabouts to a corridor with signalized intersections in order to arrive at a design solution. For the purposes of this research, a “...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 769: A Guide for Public Transportation Pandemic Planning and Response is designed to assist transportation organizations as they prepare for pandemics and other infectious diseases such as seasonal flu. Addressing decision-making challenges in pandemic response in the transportation context is a multi-dimensional task, involving...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 767: Measuring and Removing Dissolved Metals from Stormwater in Highly Urbanized Areas presents prototype best management practices (BMPs) for the removal of dissolved metals in stormwater runoff. The report presents three conceptual configurations in detail: two vault system configurations for urban and rural settings, and an i...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 766: Recommended Bicycle Lane Widths for Various Roadway Characteristics presents an analysis of the research and design guidance for bicycle lane widths on existing travel lane widths and parking lane widths. The conclusions are most applicable to urban and suburban roadways with level grade and a posted speed limit of 30 mph a...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 776: Bridge System Safety and Redundancy provides proposed revisions to the design philosophy section of the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications. The following appendices are available for download: A1: Specifications A2...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 764: Using Peer Exchanges to Improve the Effectiveness of Strategic Highway Safety Plans contains guidance for state departments of transportation on how to plan and conduct state-level peer exchanges as a means for identifying strategies, tactics, and practices to improve implementation, evaluation, and updating of their Strate...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 763: Evaluation of the Moisture Susceptibility of WMA Technologies presents proposed guidelines for identifying potential moisture susceptibility in warm mix asphalt (WMA). The report also suggests potential revisions to the Appendix to AASHTO R 35, “Special Mixture Design Considerations and Methods for WMA” as a means to implem...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 762: Laboratory Validation of an Endurance Limit for Asphalt Pavements presents models for the hot-mix asphalt fatigue endurance limit that are responsive to asphalt binder and mixture properties and healing between load cycles and are suitable for incorporation as algorithms in Pavement Mechanistic-Empirical Design and other de...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 761: Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction presents a reference guide designed to help identify and evaluate the uncertainties associated with bridge scour prediction including hydrologic, hydraulic, and model/equation uncertainty. For complex foundation systems and channe...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 760: Improving the Quality of Motorcycle Travel Data Collection presents an analysis of traffic counting technologies and data collection protocols designed to help improve the reliability of motorcycle travel data. The technologies examined include infrared classifiers, inductive loops/piezoelectric sensors, magnetometers, mult...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 759: Effective Removal of Pavement Markings aids in the selection of safe, cost-effective, and environmentally acceptable practices for the removal of work zone and permanent pavement markings. The practices highlighted in this report emphasize minimal damage to the underlying pavement or visible character of the surface course.

TRB’s National Cooperative Highway Research Program (NCHRP) Report 758: Trip Generation Rates for Transportation Impact Analyses of Infill Developments details a procedure for analyzing potential vehicular trip generation impacts in urban and urbanizing locales.

TRB’s National Cooperative Highway Research Program (NCHRP) Report 757: Long-Term Performance of Epoxy Adhesive Anchor Systems describes standard test methods and specifications, design guidelines and specifications, and quality assurance guidelines and construction specifications for the use of adhesive anchor systems in transportation structures.

TRB’s National Cooperative Highway Research Program (NCHRP) 756: Highway Safety Research Agenda: Infrastructure and Operations develops a proposed agenda of prioritized safety research needs in the area of highway infrastructure and operations. The report provides options to the U.S. transportation community on how to direct research to the areas where it can provide the most benefit. The agend...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 755: Comprehensive Costs of Highway-Rail Grade Crossing Crashes describes a process for estimating the costs of highway-rail grade crossing crashes. A spreadsheet-based tool to facilitate use of the cost estimation process is available online.

TRB’s National Cooperative Highway Research Program (NCHRP) Report 754: Improving Management of Transportation Information is a selective review of practices of state departments of transportation (DOTs) and other agencies that collect, store, and use transportation data and information. The report also includes potential guidance on strategies and actions a DOT might implement to help improve ...