 Permanent Signs Mounted on Median BarriersJuly 24, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 465: Permanent Signs Mounted on Median Barriers reports on the current state of practice for mounting permanent highway signs on top of rigid median barriers throughout the United States.
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 Managing Longitudinal Utility Installations on Controlled Access Highway Right-of-Way July 7, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 462: Managing Longitudinal Utility Installations on Controlled Access Highway Right-of-Way surveys state departments of transportation (DOTs) to identify and synthesize exemplary practices to help highway officials manage longitudinal utility installations on controlled access highway right-of-ways.
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 Sharing Operations Data Among AgenciesJune 10, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 460: Sharing Operations Data Among Agencies document both the qualitative and quantitative business cases for sharing data among transportation-related agencies. The study also documents the institutional, legal, and technical challenges that can inhibit data sharing.
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 Using the Economic Value Created by Transportation to Fund TransportationMay 20, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 459: Using the Economic Value Created by Transportation to Fund Transportation presents information on financing mechanisms used by transportation agencies to capture a portion of the economic value created by public investment in transportation infrastructure to fund transportation improvements. The report provides an overvi...
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 Roadway Safety Data Interoperability Between Local and State AgenciesApril 18, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 458, Roadway Safety Data Interoperability Between Local and State Agencies provides an overview of the state of the practice regarding the interoperability between state and local safety data. The report also highlights agency practices that supporta data-driven safety program on all public roads.
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 Implementation of the AASHTO Mechanistic-Empirical Pavement Design Guide and SoftwareApril 16, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 457: Implementation of the AASHTO Mechanistic-Empirical Pavement Design Guide and Software documents the experience of transportation agencies in the implementation of the 2008 American Association of State Highway and Transportation Officials (AASHTO) Mechanistic-Empirical Pavement Design Guide: A Manual of Practice (MEPDG) ...
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 Non-Nuclear Methods for Compaction Control of Unbound MaterialsFebruary 21, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 456: Non-Nuclear Methods for Compaction Control of Unbound Materials documents information on national and international experience with non-nuclear devices and methods for measuring compaction of unbound materials.
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 Alternative Technical Concepts for Contract Delivery MethodsApril 3, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 455: Alternative Technical Concepts for Contract Delivery Methods Transportation documents various methods by which agencies have successfully implemented alternative technical concepts (ATCs) during the highway contracting process. The report identifies methods that promote transparency and fairness, while at the same time p...
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 Response to Extreme Weather Impacts on Transportation SystemsMay 29, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 454: Response to Extreme Weather Impacts on Transportation Systems examines eight recent cases of extreme weather in the United States from the perspectives of transportation operations, maintenance, design, construction, planning, communications, interagency coordination, and data and knowledge management. Appendices C-H are...
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 State Bridge Load Posting Processes and PracticesApril 11, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 453: State Bridge Load Posting Processes and Practices is a synthesis of the practices of U.S. state governments in restricting weights of vehicles that can cross highway bridges and culverts to levels below legal loads. Bridges and culverts restricted for vehicle weights are called load posted structures. The load posting pr...
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 State Department of Transportation Fleet Replacement Management PracticesMarch 1, 2014 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 452: State Department of Transportation Fleet Replacement Management Practices explores the current state of the practice regarding fleet replacement management and financing methods by state departments of transportation. The report also includes a discussion of the perceived strengths and weaknesses of different management ...
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 Emergency Medical Services Response to Motor Vehicle Crashes in Rural AreasSeptember 20, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 451: Emergency Medical Services Response to Motor Vehicle Crashes in Rural Areas identifies potential factors that may help reduce the time needed to provide effective medical care to crash occupants on rural roads.
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 Forecasting Highway Construction Staffing RequirementsSeptember 2, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 450: Forecasting Highway Construction Staffing Requirements gathers information on the methods being used at highway transportation agencies to forecast staffing requirements.
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 State Department of Transportation Small Business ProgramsAugust 5, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 448: State Department of Transportation Small Business Programs identifies successful strategies that maximize Disadvantaged Business Enterprise program achievements through race-neutral measures.
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 Active Traffic Management for ArterialsJuly 10, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 447: Active Traffic Management for Arterials explores practices associated with the design, implementation, and operation of active traffic management (ATM) on arterial roadways. ATM includes a suite of strategies that are used to manage traffic flow in order enhance capacity and safety.
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 Practices for Unbound Aggregate Pavement LayersNovember 22, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 445: Practices for Unbound Aggregate Pavement Layers consolidates information on the state-of-the-art and state-of-the-practice of designing and constructing unbound aggregate pavement layers. The report summarizes effective practices related to material selection, design, and construction of unbound aggregate layers to poten...
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 Pollutant Load Reductions for Total Maximum Daily Loads for HighwaysMay 31, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 444, Pollutant Load Reductions for Total Maximum Daily Loads for Highways presents information on the types of structural and non-structural best management practices currently being used by state departments of transportation, including performance and cost data.
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 Practical Highway Design SolutionsMarch 15, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 443: Practical Highway Design Solutions presents information on the application of practical design approaches in roadway project development. Practical design is the default term used in the report to describe approaches or initiatives some state transportation agencies have adopted that result in design solutions for specif... |