TRB's National Cooperative Highway Research Program (NCHRP) has released a prepublication, non-edited version of Research Report 903: Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview and Volume 2: Implementation Manual. Volume 1 provides the methodology behind delivering a manual for implementing geotechnical asset management (GAM) practices within transpor...

TRB's National Cooperative Highway Research Program (NCHRP) has released a prepublication, non-edited version of Research Report 903: Geotechnical Asset Management for Transportation Agencies, Volume 2: Implementation Manual (the "GAM Implementation Manual"). Volume 2 provides guidance for maintaining geotechnical assets including walls, slopes, embankments, and subgrades. This report includes ...

TRB’s National Cooperative Highway Research Program (NCHRP) has released a pre-publication version of Research Report 911: Guidelines for Slope Traversability, which includes guidelines for determining the traversability of roadside slopes considering the characteristics of the current passenger vehicle fleet. As part of development of this report, researchers performed full-scale traversabilit...

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 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...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 897: Tools to Facilitate Implementation of Effective Metropolitan Freight Transportation Strategies provides transportation practitioners and decision makers with guidance for implementing effective metropolitan freight transportation strategies. The report outlines thirty strategies that are tailored to the specific ci...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 896: Updating Regional Transportation Planning and Modeling Tools to Address Impacts of Connected and Automated Vehicles, Volume 2: Guidance provides detailed information and guidelines for state departments of transportation (DOTs) and metropolitan planning organizations (MPOs) to help update their modeling and forecas...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 896: Updating Regional Transportation Planning and Modeling Tools to Address Impacts of Connected and Automated Vehicles, Volume 1: Executive Summary summarizes guidelines to help agencies update their modeling and forecasting tools to address expected impacts of connected and automated vehicles (CAVs) on transportation...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 895: Simplified Full-Depth Precast Concrete Deck Panel Systems describes new connections between full-depth precast concrete deck panels and beams. These connections are simplified with regard to constructability, inspection during construction, reducing the impact of construction on traffic, and future deck replacement...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 894: Performance of Longitudinal Barriers on Curved, Superelevated Roadway Sections  presents guidance on designing, selecting, and installing longitudinal traffic barriers for curved, superelevated roadways for possible incorporation in the American Association of State Highway and Transportation Officials (AASHTO...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 893: Systemic Pedestrian Safety Analysis provides a safety analysis method that can be used to proactively identify sites for potential safety improvements based on specific risk factors for pedestrians. A systemic approach, as opposed to a “hot-spot” approach, enables transportation agencies to identify, prioritize, an...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 892: Guidelines for Shielding Bridge Piers provides proposed load and resistance factor design (LRFD) bridge design pier protection specifications and proposed occupant protection guidelines. Bridge piers are generally close to the roadway to minimize bridge lengths. As a consequence, barriers are normally placed around...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 891: Dedicating Lanes for Priority or Exclusive Use by Connected and Automated Vehicles identifies and evaluates opportunities, constraints, and guiding principles for implementing dedicated lanes for connected and automated vehicles. This report describes conditions amenable to dedicating lanes for users of these vehic...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 890: Using Recycled Asphalt Shingles with Warm Mix Asphalt Technologies documents the development of a design and evaluation procedure that provides acceptable performance of asphalt mixtures incorporating warm mix asphalt (WMA) technologies and recycled asphalt shingles (RAS)—with and without recycled asphalt pave...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 889: Performance Measures in Snow and Ice Control Operations presents approaches for monitoring the performance of snow and ice control activities by public agencies and proposes a core set of performance measures that can be customized and used by agencies to meet their snow and ice control objectives. The report inclu...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 888: Development of Roundabout Crash Prediction Models and Methods provides crash prediction models that quantify the expected safety performance of roundabouts for motorized and non-motorized road users. Safety performance factors (SPF) and crash modification factors (CMF) are predictive models that estimate expected c...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 887: Guidance for Underwater Installation of Filter Systems provides guidance on design procedures, material testing requirements, installation alternatives, and quality checklist items for both granular and geotextile filters. Filters are an important countermeasure for stream instability or bridge scour and are essent...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 886: Field Evaluation of Reflected Noise from a Single Noise Barrier analyzes the characteristics of sound reflected from a noise barrier to the opposite side of a highway. State departments of transportation (DOTs) periodically receive complaints from residents about increases in traffic noise that residents believe ar...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 885: Guide to Creating and Sustaining a Culture of Innovation for Departments of Transportation presents guidance for government transportation agencies on encouraging and sustaining a culture of innovation within the organization, its partners, and other stakeholders. A culture of innovation supports agency managers an...