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Newsletter - 230530
Transportation Research Board > Blurbs

    Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges
    5/25/2023 2:00:28 PM
    Many bridges are built without accommodations for active transportation users and only serve motorized traffic. The pedestrians and bicyclists who rely on these bridges are exposed to safety-related concerns and their access to equal employment opportunities and essential services may be hindered. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 604: Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges documents the practices employed by state departments ...


    Resilient Design with Distributed Rainfall-Runoff Modeling
    5/18/2023 2:00:09 PM
    The increased frequency of extreme rainfall events, inland and coastal flooding, and other water-related stressors poses challenges to roadway infrastructure. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 602: Resilient Design with Distributed Rainfall-Runoff Modeling documents the practices of state departments of transportation on the use of DRRMs and identifies state DOTs that have adopted DRRMs and the context in which these models are applied.


    Practices for the Collection, Use, and Management of Utility As-Built Information
    5/5/2023 6:00:33 PM
    As-builts, inclusive of utility as-builts—which are the recorded representation of the built or maintained infrastructure and show the actual location, dimensions, geometry, and other attributes of the work as completed—can provide a baseline for new design projects by providing information on current transportation infrastructure and other facilities such as underground and overhead utilities. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 600: Practices for the Collection, Use,...


    Practices for Bioretention Stormwater Control Measures
    4/28/2023 2:00:57 PM
    Bioretention stormwater control measure (BSCM) runoff treatment provides several benefits over other stormwater control measures (SCMs) and is increasingly used by state departments of transportation (DOTs) to help manage stormwater to meet stormwater permit requirements. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 599: Practices for Bioretention Stormwater Control Measures documents DOT practices for the implementation and use of BSCMs. Supplemental to the report is a zipped ...


    Practices for Local Calibration of LRFD Geotechnical Resistance Factors
    4/25/2023 6:00:38 PM
    More than 15 years have passed since the U.S. transportation industry started its transition from allowable stress design (ASD) to load and resistance factor design (LRFD). For geotechnical design, the AASHTO LRFD Bridge Design Specifications includes provisions that allow state departments of transportation (DOTs) to develop their own design methods and resistance factors. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 601: Practices for Local Calibration of LRFD Geotechnical Re...


    Curing Practices for Concrete Pavements
    3/30/2023 2:00:38 PM
    Curing is a major contributor to the short- and long-term performance of concrete pavements. Effective curing controls moisture loss and maintains adequate temperature of concrete pavements to allow for the continuation of cement hydration and formation of hydrated gel necessary to develop desired strength and durability. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 598: Curing Practices for Concrete Pavements documents state department of transportation curing procedures, curi...


    Micromobility Policies, Permits, and Practices
    11/29/2022 7:00:46 PM
    Micromobility vehicles and shared micromobility technologies are deploying rapidly in many cities across the United States and internationally. Lacking a standard definition, micromobility can include any small, personal transportation technology that travels slower than 20 to 30 miles per hour, may be motorized, and is frequently operated on pedestrian- or bicycle-oriented infrastructure (often, bicycles, e-bikes, or e-scooters). The TRB National Cooperative Highway Research Program's NCHRP Synthesis 59...


    Technological Capabilities of Departments of Transportation for Digital Project Management and Delivery
    9/23/2022 3:00:00 PM
    Technology solutions are in no short supply for state departments of transportation across the United States. With advancements in geospatial accuracy, cost reduction for technology components, and a need for effective staff utilization, a wealth of products and systems are becoming attractive options in the delivery of highway projects. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 594: Technological Capabilities of Departments of Transportation for Digital Project Management a...


    Measuring Investments in Active Transportation When Accomplished as Part of Other Projects
    9/9/2022 4:15:03 PM
    There are few inventories of state investments in active transportation, at least partially because there is no federally mandated requirement to report on these investments. They are often accomplished as part of larger infrastructure projects, in order to realize the efficiencies inherent in making changes across modes on a network at the same time. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 596: Measuring Investments in Active Transportation When Accomplished as Part of Ot...


    Bridge Element Data Collection and Use
    9/9/2022 4:00:18 PM
    Initial efforts to define and collect bridge element data in the United States started in the late 1990s with the development and implementation of bridge management systems (BMSs). Over the years, the bridge management community provided feedback and made suggestions to improve the bridge element inspection methodology. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 585: Bridge Element Data Collection and Use documents current state departments of transportation (DOTs) practices...


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