TRB's National Cooperative Highway Research Program (NCHRP)  Research Report 903: Geotechnical Asset Management for Transportation Agencies, Volume 2: Implementation Manual presents a manual that can be used to implement Geotechnical Asset Management (GAM) planning. Volume 1 , Research Overview, details the scope, process, and findings of the study. The management of bridge and pavement as...

State transportation agencies will always fulfill a role in the emergency-management effort - for all incidents, from the routine traffic incident through major emergencies to catastrophic events. State agency plans and procedures are expected (indeed required if the agency seeks federal compensation) to be related to state and regional emergency structures and plans. This involves multi-agency...

Since 2009, when NCHRP's last Security 101 report was released, there have been significant advances in transportation security approaches, including new strategies, programs, and ways of doing business that have increased the security of transportation systems as well as ensured their resiliency. Hazards and threats to the system have also continued to evolve since 2009. While the inciden...

TRB’s National Cooperative Highway Research Program (NCHRP) has release a pre-publication version NCHRP Research Report 920: Management and Use of Data for Transportation Performance Management: Guide for Practitioners that provides practical guidance to transportation agencies to help improve their use of data for performance management. Recent federal legislation has established requirements ...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 918: Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff has been released in pre-publication format. The report includes strategies to help improve total maximum daily load (TMDL) evaluations and assist in the decision-making process for the development of and compliance...

TRB’s National Cooperative Highway Research Program (NCHRP) has released the pre-publication version of NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils, which provides reliable and simple equations quantifying the erodibility of soils based on soil properties. The report a detailed analysis of the issue. In addition, the project that developed the report also...

Pavement smoothness (or roughness) is used by state highway agencies for monitoring network condition and other purposes such as assessing construction quality and optimizing investments in preservation, rehabilitation, and reconstruction. States are also required to report the International Roughness Index (IRI) as an element of the federal Highway Performance Monitoring System (HPMS). Because...

Firms that have graduated from the federal Disadvantaged Business Enterprise (DBE) program or have successfully competed for state transportation agency contracts are the focus in NCHRP Research Report 913: Compendium of Successful Practices, Strategies, and Resources in the U.S. DOT Disadvantaged Business Enterprise Program. The DBE program provides small businesses owned and controlled by soc...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 912: Guidelines for Detection and Remediation of Soluble Salt Contamination Prior to Coating Steel Highway Structures consolidates practical guidance on the detection and remediation of soluble salt contamination prior to coating steel highway structures. Soluble salts are those that dissociate in solution into anionic ...

Geometric design practitioners in state transportation agencies have a new set of guidelines on probability of vehicle rollover based on various roadside design features. NCHRP Research Report 911: Guidelines for Traversability of Roadside Slopes will assist practitioners in the reduction of serious injury crashes associated with rollovers on roadside slopes. Data from the National Automotive S...

The distance between the driver’s line of sight along the roadway ahead on a horizontal curve and a sight obstruction on the inside of the curve is known as the horizontal sightline offset (HSO). Highway agencies can use  NCHRP Research Report 910: Design Guidelines for Horizontal Sightline Offsets as guidance to address the types of sight distance restrictions that are most likely to be e...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 909: Guide to Truck Activity Data for Emissions Modeling explores methods, procedures, and data sets needed to capture commercial vehicle activity, vehicle characteristics, and operations to assist in estimating and forecasting criteria pollutants, air toxics, and greenhouse gas emissions from goods and services movemen...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 908: Acceptance Criteria of Complete Joint Penetration Steel Bridge Welds Evaluated Using Enhanced Ultrasonic Methods presents guidelines for evaluating complete joint penetration (CJP) welds in steel bridges and proposes modifications to the American Association of State Highway and Transportation Officials (AASHTO)/Am...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 906 includes proposed revisions to the AASHTO LRFD Bridge Design Specifications minimum flexural reinforcement provisions for load and resistance factor design (LRFD) with detailed design examples illustrating the application of the proposed revisions. According to the AASHTO LRFD Bridge Design Specifications, minimum r...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 905: Measuring the Effectiveness of Public Involvement in Transportation Planning and Project Development provides a field-validated and practitioner-ready toolkit to measure the effectiveness of a transportation agency’s public involvement activities. The toolkit is designed to collect feedback from the public on sever...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 903: Geotechnical Asset Management for Transportation Agencies provides an introduction and scalable guidance for state transportation agencies on how to implement risk-based geotechnical asset management into current asset management plans. Volume 1, Research Overview, details the scope, process, and findings of the st...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 902: Benchmarking and Comparative Measurement for Effective Performance Management by Transportation Agencies presents guidance and examples for selection of peer groups to ensure that benchmarking is effectively applied to enhance transportation system performance. Benchmarking—comparison of oneself with peers—has been...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 901: Prioritization Procedure for Proposed Road–Rail Grade Separation Projects Along Specific Rail Corridors is designed to assist state and local planners in making prioritization and investment decisions for road–rail at-grade crossing separations. The report provides a comprehensive means of comparing similar project...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 900: Guide for the Analysis of Multimodal Corridor Access Management describes operational and safety relationships between access management techniques and the automobile, pedestrian, bicycle, public transit, and truck modes. This report may help assist in the selection of alternative access management techniques ...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 898: A Guide to Developing Financial Plans and Performance Measures for Transportation Asset Management presents guidance for state departments of transportation (DOTs) and other agencies conducting financial analyses and developing financial plans to support efficient and effective management of the agency’s transporta...