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Showing 221 - 240 of 16092 results
  • Federal Highway Administration FHWA Connected and Automated Vehicles CAV Analysis Modeling and Simulation AMS Program Future Effective Capacity Assessing Traffic Flow Impacts for Variable Levels of Automation and Market Acceptance
    Federal Highway Administration (FHWA) Connected and Automated Vehicles (CAV) Analysis, Modeling, and Simulation (AMS) Program: Future Effective Capacity: Assessing Traffic Flow Impacts for Variable Levels of Automation and Market Acceptance
    Grahn, Rick ;
    Silverstein, Claire
    2024-11-01 | PDF
    Automated vehicle (AV) technologies promise numerous benefits to highway capacity and stability through improved reaction times and optimized decision-making processes. However, commercially available automated features (mostly at lower levels of automation) do not exhibit the same behaviors assumed in theoretical studies, which limits near-term be ...
  • Influence of Operations Strategies on Third Performance Management Rulemaking PM3 and Other Travel TimeBased Measures Primer Part One Recurring Congestion Strategies
    Influence of Operations Strategies on Third Performance Management Rulemaking (PM3) and Other Travel Time-Based Measures Primer Part One Recurring Congestion Strategies
    Margiotta, Richard A. ;
    Hallenbeck, Mark E.
    2024-11-01 | PDF
    The purpose of this Primer is to: 1) summarize previous methods used to evaluate operations strategies, 2) document the recurring congestion operational strategy implementation evaluation methodology developed for the project, including the performance measures needed to characterize benefits and costs and how to relate to third performance managem ...
  • Incorporating Nondestructive Evaluation Methods Into Bridge Deck Preservation Strategies TechBrief
    Incorporating Nondestructive Evaluation Methods Into Bridge Deck Preservation Strategies [TechBrief]
    Brown, Michael C ;
    ElBatanouny, Mohamed K.
    2024-11-01 | PDF
    The study focused on suitable Nondestructive Evaluation (NDE) methods for the range of common wearing surfaces and the associated inputs for selecting preservation actions. The researchers developed a framework to guide the implementation and interpretation of NDE and the selection of treatment alternatives based on the life stage of a bridge deck ...
  • Linking NDE Data and Bridge Deck Performance TechBrief
    Linking NDE Data and Bridge Deck Performance [TechBrief]
    Nejad, Saeed ;
    Washer, Glenn A.
    2024-11-01 | PDF
    This tech brief provides an overview of the research conducted to study accelerated testing data and to demonstrate how nondestructive evaluation (NDE) data are analyzed and interpreted to enhance understanding of bridge deck performance. The study included a reliability analysis of the NDE data collected, integration of NDE data with conventional ...
  • A Systematic Approach to Selection of CMS Messaging During Nonrecurring Events
    A Systematic Approach to Selection of CMS Messaging During Nonrecurring Events
    Weaver, Starla ;
    Jannet, Mafruhatul
    2024-11-01 | PDF
    Changeable message sign (CMS) messaging can be an important tool for distributing traveler information to drivers. Careful CMS message selection may help drivers make informed travel decisions and increase the safety and usability of roadways, particularly during nonrecurring events. The current work consists of two experiments designed to increase ...
  • TurnerFairbank Highway Research Center Office of Research Services HRRS
    Turner-Fairbank Highway Research Center: Office of Research Services (HRRS)
    United States. Department of Transportation. Federal Highway Administration
    2024-11-01 | PDF
    This fact sheet provides an overview of the Office of Research Services (HRRS). The HRRS oversees the strategic direction and coordination of the Federal Highway Administration’s (FHWA) research agenda and programs; management and operation of a federally owned and operated research facility called the Turner-Fairbank Highway Research Center (TFHRC ...
  • Innovation Exchange Webinar Conversations Launching Change
    Innovation Exchange Webinar: Conversations Launching Change
    United States. Department of Transportation. Federal Highway Administration
    2024-11-01 | PDF
    Join the staff from FHWA, including the Office of Federal Lands Highway, and the U.S. Forest Service to learn more about the state-of-the-practice and the state-of-the-art for NDE techniques. The webinar will include speakers from the Turner Fairbank Highway Research Center as well as field staff with experience in NDE. Case studies and relevant ex ...
  • National Travel Time Dashboard Interstate Highways November 2024
    National Travel Time Dashboard: Interstate Highways, November 2024
    United States. Department of Transportation. Federal Highway Administration. Office of Operations
    2024-11-01 | National Travel Time Dashboard: Interstate Highways | PDF
    The Monthly Urban Congestion Report (UCR) provides a state-level overview of traffic congestion and reliability trends on Interstate highways. Published every month, the report compares data from the most recent month with the same month in the previous year. It uses travel time data from the Federal Highway Administration’s National Performance Ma ...
  • Federal Highway Administration FHWA Connected and Automated Vehicles CAV Analysis Modeling and Simulation AMS Program Connected Automated and Electric Modeling Traffic and Traveler Choice Considering the Three MegaTrends
    Federal Highway Administration (FHWA) Connected and Automated Vehicles (CAV) Analysis, Modeling, and Simulation (AMS) Program: Connected, Automated, and Electric: Modeling Traffic and Traveler Choice Considering the Three Mega-Trends
    Grahn, Rick ;
    Wang, Peiwei
    2024-11-01 | PDF
    The rapid development and deployment of traveler connectivity, automated vehicle (AV), and electric vehicle (EV) technologies are changing the way people use and interact with the transportation system. These behavioral shifts are impacting the accuracy of standard AMS tools due to more complex decision-making processes, new mobility service models ...
  • About the TurnerFairbank Highway Research Center TFHRC
    About the Turner-Fairbank Highway Research Center (TFHRC)
    United States. Department of Transportation. Federal Highway Administration
    2024-11-01 | PDF
    This fact sheet provides a summary of the various teams that work under the Turner-Fairbank Highway Research Center (TFHRC) - Office of Infrastructure Research and Development (R&D). They include the following teams: Infrastructure Materials, Long-term Infrastructure Performance,Infrastructure Analysis, Bridge Engineering, Roadway, Safety Data and ...
  • Strategic Workforce Development I81 Viaduct Project in Syracuse NY
    Strategic Workforce Development: I-81 Viaduct Project in Syracuse, N.Y.
    United States. Department of Transportation. Federal Highway Administration
    2024-11-01 | PDF
    After more than 50 years of heavy use—about 100,000 vehicles every day—and harsh winter weather, portions of Interstate 81 in Syracuse, N.Y., were deteriorating and experiencing high accident rates. This was especially true of a 1.4-mile elevated section, or "viaduct," near downtown Syracuse. So, when the New York State Department of Transportation ...
  • November 2024 RT Now Interchanges Associate Administrator Dr Kelly Regal Sails Away Audio
    November 2024 R&T Now Interchanges: Associate Administrator Dr. Kelly Regal Sails Away [Audio]
    Thor, Craig P. ;
    Regal, Kelly
    2024-11-01 | R&T Now Interchanges | MPEG
    In this episode, Kelly Regal discusses changes made to TFHRC; challenges for the next Associate Administrator; and key takeaways.
    Supporting Files
  • High Friction Surface Treatment Gets Gripping Results in Pennsylvania
    High Friction Surface Treatment Gets Gripping Results in Pennsylvania
    United States. Department of Transportation. Federal Highway Administration
    2024-11-01 | PDF
    For years, Route 611 in Northampton County, Pennsylvania had multiple severe crashes, especially on curves. That changed in 2007 when the Pennsylvania Department of Transportation (PennDOT) tried a new technology called high friction surface treatment (HFST). It was a new aggregate, calcined bauxite, applied over an epoxy base poured and spread on ...
  • Underwater Bridge Repair Rehabilitation and Countermeasures Reference Manual
    Underwater Bridge Repair, Rehabilitation, and Countermeasures Reference Manual
    Dukes, Michael D. ;
    Karalekas, James M.
    2024-11-01 | PDF
    Repairs to underwater bridge elements have been successfully completed for many years. However, the increased age of the Nation’s bridges and related structures, as well as the increased emphasis in regular underwater inspection since the revisions to the National Bridge Inspection Standards in 1988, indicates an increased need to perform repairs t ...
  • Intelligent Transportation System ITS Cybersecurity Specs and Apps System Requirements and Specification
    Intelligent Transportation System (ITS) Cybersecurity Specs and Apps: System Requirements and Specification
    Rush, Kyle ;
    Russell, Brian
    2024-10-31 | PDF
    This report presents the field device security configuration tool prototype system requirement and specification (SRS) for the intelligent transportation system (ITS) Cybersecurity Specs and Apps task order. The SRS describes the functional and non-functional requirements, such as portability, reliability, security, performance, availability, and m ...
  • Special Issue Weekly Motor Fuel Report Gasoline Product Supplied for Fiscal Year Week No 4 Data Complete Through 10252024
    Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 4, Data Complete Through 10/25/2024
    United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
    2024-10-25 | Special Issue - Weekly Motor Fuel Report | PDF
    The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration ...
  • Special Issue Weekly Motor Fuel Report Gasoline Product Supplied for Fiscal Year Week No 3 Data Complete Through 10182024
    Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 3, Data Complete Through 10/18/2024
    United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
    2024-10-23 | Special Issue - Weekly Motor Fuel Report | PDF
    The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration ...
  • ADS and Traffic Regulations Voluntary Specifications Development Playbook
    ADS and Traffic Regulations Voluntary Specifications Development Playbook
    Garrett, Kyle ;
    Ma, Jiaqi
    2024-10-21 | PDF
    The purpose of this playbook is to identify the processes and activities necessary to create a stakeholder-administered, voluntary specification development and maintenance process for traffic regulation data to support automated driving systems. The playbook envisions a process whereby stakeholders convene as a working group to collaborate on spec ...
  • Special Issue Weekly Motor Fuel Report Gasoline Product Supplied for Fiscal Year Week No 2 Data Complete Through 10112024
    Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 2, Data Complete Through 10/11/2024
    United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
    2024-10-17 | Special Issue - Weekly Motor Fuel Report | PDF
    The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration ...
  • Synthesis Report Bilateral Exchanges between the Federal Highway Administration and the Netherlands Rijkswaterstaat
    Synthesis Report: Bilateral Exchanges between the Federal Highway Administration and the Netherlands' Rijkswaterstaat
    O'Rourke, Laurence ;
    Ham, Marcel
    2024-10-11 | PDF
    This synthesis report documents the Binational Relations Program (BRP) between the Federal Highway Administration (FHWA) and Rijkswaterstaat (RWS), the executive arm of the Netherlands Ministry of Infrastructure and Water Management, detailing the activities, outputs, challenges, benefits, and opportunities for improvement of the 15-year-old collab ...
221 - 240 / 16092