Geotechnical Asset Management for Transportation Agencies, Volume 1: Research OverviewJanuary 4, 2019 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...
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Geotechnical Asset Management for Transportation Agencies, Volume 2: Implementation ManualJanuary 4, 2019 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 ...
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Benchmarking and Comparative Measurement for Effective Performance Management by Transportation AgenciesJanuary 11, 2019 TRB's National Cooperative Highway Research Program (NCHRP) has released a pre-publicaiton, non-edited version of Research Report 902: Benchmarking and Comparative Measurement for Effective Performance Management by Transportation Agencies. The report provides guidance and examples for how transportation agencies can ensure that benchmarking is effectively applied to enhance transportation syst...
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Guide for the Analysis of Multimodal Corridor Access ManagementDecember 28, 2018 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 ...
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A Guide to Developing Financial Plans and Performance Measures for Transportation Asset Management October 11, 2018 TRB's National Cooperative Highway Research Program (NCHRP) has released a pre-publication, non-edited version of Research Report 898: A Guide to Developing Financial Plans and Performance Measures for Transportation Asset Management. The report presents guidance for state departments of transportation (DOTs) and other agencies conducting financial analyses and developing financial plans to sup...
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Tools to Facilitate Implementation of Effective Metropolitan Freight Transportation StrategiesDecember 27, 2018 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...
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Simplified Full-Depth Precast Concrete Deck Panel SystemsDecember 4, 2018 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...
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Evaluating the Performance of Longitudinal Barriers on Curved, Superelevated Roadway SectionsOctober 23, 2018 TRB's National Cooperative Highway Research Program (NCHRP) has released a pre-publication, non-edited version of Research Report 894: Evaluating the Performance of Longitudinal Barriers on Curved, Superelevated Roadway Sections. Curved, high-speed roadways are usually superelevated to make the curved roadway easier for vehicles to navigate. However, the angle of these roadways can cause an inc...
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Systemic Pedestrian Safety AnalysisOctober 12, 2018 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...
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Guidelines for Shielding Bridge Piers November 9, 2018 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...
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Dedicating Lanes for Priority or Exclusive Use by Connected and Automated VehiclesJanuary 11, 2019 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...
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Using Recycled Asphalt Shingles with Warm Mix Asphalt TechnologiesNovember 1, 2018 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...
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Development of Roundabout Crash Prediction Models and Methods January 21, 2019 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...
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Guidance for Underwater Installation of Filter SystemsOctober 30, 2018 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...
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Field Evaluation of Reflected Noise from a Single Noise BarrierOctober 25, 2018 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...
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Guide to Creating and Sustaining a Culture of Innovation for Departments of TransportationNovember 6, 2018 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...
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Guidelines for Managing Geotechnical Risks in Design–Build ProjectsSeptember 18, 2018 TRB's National Cooperative Highway Research Program (NCHRP) Research Report 884: Guidelines for Managing Geotechnical Risks in Design–Build Projects provides guidelines for the implementation of geotechnical risk management measures for design –build project delivery . The guidelines provide five strategies for aligning a transportation agency and its design–builder’s perception of geotechnical...
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Fracture-Critical System Analysis for Steel BridgesAugust 22, 2018 TRB's National Cooperative Highway Research Program (NCHRP) Research Report 883: Fracture-Critical System Analysis for Steel Bridges presents a proposed specification for the analysis and identification of fracture-critical members and system-redundant members. The report describes the analysis methodology and provides application examples. The analysis methodology is based on comprehensive 3-D... |