 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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 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...
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 Practices and Performance Measures for Local Public Agency Federally Funded Highway ProjectsMay 2, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 442: Practices and Performance Measures for Local Public Agency Federally Funded Highway Projects explores what performance measures, delivery practices, strategies, and tools are currently used in relation to federally-funded local public agency (LPA) highway project development and delivery, and how they are used to measure...
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 High Performance Concrete Specifications and Practices for BridgesApril 11, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 441: High Performance Concrete Specifications and Practices for Bridges documents the types of specifications and practices used by state transportation agencies to produce high performance concrete for bridges. The report also identifies specifications and practices reported as having improved concrete performance and t...
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 Performance-Based Seismic Bridge DesignMarch 28, 2013 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 440, Performance-Based Seismic Bridge Design (PBSD) summarizes the current state of knowledge and practice for PBSD. PBSD is the process that links decision making for facility design with seismic input, facility response, and potential facility damage. The goal of PBSD is to provide decision makers and stakeholders with data...
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 Expedited Procurement Procedures for Emergency Construction ServicesNovember 20, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 438: Expedited Procurement Procedures for Emergency Construction Services explores procurement procedures being utilized by state departments of transportation in coordination with federal agencies to repair and reopen roadways in emergency situations.
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 Assessing the Long-Term Performance of Mechanically Stabilized Earth WallsSeptember 6, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 437: Assessing the Long-Term Performance of Mechanically Stabilized Earth Walls explores methods to assess the long-term performance of mechanically stabilized earth walls. For the purposes of the report, "long-term" denotes the period of time from approximately one year after the wall is in service until the end of its desig... |