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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 1701 - 1720 of 36873 results
  • Strengthening the Deployment of Uncrewed Aerial Systems UAS at KYTC
    Strengthening the Deployment of Uncrewed Aerial Systems (UAS) at KYTC
    Catchings, Rachel ;
    Smith, Suzanne
    2024-03-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) and transportation agencies around the United States increasingly depends on uncrewed aircraft systems (UAS — also commonly known as drones) to collect data and accelerate project development and delivery. Drones let transportation practitioners safely and efficiently perform many activities, including bri ...
  • Asphalt Mixture Automated Testing System with Zero Intervention AMAZE Revised Training Curriculum
    Asphalt Mixture Automated Testing System with Zero Intervention (AMAZE): Revised Training Curriculum
    Zhou, Fujie ;
    Roa, Jorge
    2024-03-01 | PDF
    State highway agencies including the Texas Department of Transportation (TxDOT) are currently facing many challenges. Three such challenges involve addressing (a) the cracking and rutting distresses that are costing taxpayers billions of dollars annually, (b) the loss of both the workforce and the skills associated with the workforce, and (c) labor ...
  • Partially Grouted Revetment for LowVolume Road Bridges
    Partially Grouted Revetment for Low-Volume Road Bridges
    Freeseman, Katelyn ;
    Phares, Brent
    2024-03-01 | PDF
    The Iowa secondary road system has a large number of scour-susceptible bridges or bridges with unknown foundation conditions. These structures are commonly required to have a plan of action (POA) to close them during flood events, or have countermeasures installed to keep them open. In the case of unknown foundations, countermeasures must be instal ...
  • Sequential Synchronization Control Scheme for Freeway Truck Platooning Formation
    Sequential Synchronization Control Scheme for Freeway Truck Platooning Formation
    Du, Lili ;
    Washburn, Scott S.
    2024-03-01 | PDF
    Truck platooning has been demonstrated as a promising approach to reduce freeway congestion, engine energy consumption, and associated emissions. However, efficient local-level algorithms to form a truck platoon without jeopardizing surrounding traffic flow’s safety and efficiency are still lacking. Motivated by this view, this study developed a Se ...
  • Asphalt Mixture Automated Testing System with Zero Intervention AMAZE
    Asphalt Mixture Automated Testing System with Zero Intervention (AMAZE)
    Zhou, Fujie ;
    Roa, Jorge
    2024-03-01 | PDF
    The Texas Department of Transportation (TxDOT) is currently facing many challenges. Three such challenges in the areas of asphalt pavements and laboratory testing involve (a) cracking and rutting distresses, (b) hiring and retaining employees, and (c) laboratory safety. TxDOT has been addressing the cracking and rutting problems by implementing a b ...
  • Consultant Support for Intelligent Compaction and PaverMounted Thermal Profiling Projects in 20222023 Research Summary
    Consultant Support for Intelligent Compaction and Paver-Mounted Thermal Profiling Projects in 2022-2023 [Research Summary]
    The Transtec Group, Inc.
    2024-03-01 | PDF
    Due to the success of the MoDOT 2017-2021 Intelligent Compaction and Paver-Mounted Thermal Profiling (IC-PMTP) projects that demonstrate the paving quality improvements on numerous field projects, MoDOT has established a plan that includes additional IC-PMTP projects in 2022 and 2023. To ensure the continued success of the MoDOT IC-PMTP projects in ...
  • NJDOT Commercial Vehicle Size and Weight Guidebook Update Technical Brief
    NJDOT Commercial Vehicle Size and Weight Guidebook Update [Technical Brief]
    Lamm, Christopher ;
    Potapa, Stefanie
    2024-03-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to perform research on recent changes to the Federal and State regulations that govern commercial vehicle size and weight limits in New Jersey, assessing “best practice” communication techniques to share information with industry, and developing updates to NJDOT’ ...
  • Evaluation of Performance and Life Cycle Cost of Asphalt 818 Specifications
    Evaluation of Performance and Life Cycle Cost of Asphalt (8/18 Specifications)
    Mayeux, Corey R ;
    Akentuna, Moses
    2024-03-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) revised its asphalt pavement specifications based upon research conducted at the Louisiana Transportation Research Center (LTRC). These changes introduced performance-based specifications in the form of the semi-circular bending (SCB) and the loaded wheel tracking (LWT) tests. Additi ...
  • Simulating Incident Management Team Response and Performance
    Simulating Incident Management Team Response and Performance
    Macfarlane, Gregory S ;
    Jarvis, Daniel
    2024-03-01 | PDF
    The effectiveness of Incident Management Teams (IMT) in reducing the duration and impact of traffic incidents is well documented. The capacity of large-scale simulation models to illustrate the negative effects of these incidents on vehicle delays and excess user costs (EUC) is also widely recognized. However, there is a gap in research integrating ...
  • Improving Roadway Debris Clearance for CHART Responders
    Improving Roadway Debris Clearance for CHART Responders
    Gong, Yaobang ;
    Tarafdar, Sayantan
    2024-03-01 | PDF
    This project evaluates LaneBlade® technology's feasibility and effectiveness in enhancing roadway debris clearance operations, focusing on improving safety for CHART responders and road users while optimizing operational efficiency. Through structured field experiments considering weather conditions, debris types, blade types, and operating speeds, ...
  • Using Apps to Notify the Public of Local Road and Bridge Closures
    Using Apps to Notify the Public of Local Road and Bridge Closures
    Deeter, Dean ;
    Roelofs, Tina
    2024-03-01 | PDF
    The traveling public increasingly relies on navigation systems, either as part of their vehicles or through their handheld phones or mobile devices. Currently there is not a consistent system, tool, or process being used by cities and counties in Minnesota to report road or bridge closures that local transportation agencies can use to display to th ...
  • Impact of the New Context Functional Classifications for KYTC
    Impact of the New Context Functional Classifications for KYTC
    Sandlin, Arlen ;
    Asher, Jill
    2024-03-01 | PDF
    State transportation agencies are adopting an expanded context classification system to inform project development and delivery. This system classifies roadways into one of five categories based on factors such as level of development, building densities and setbacks, multimodal user patterns and requirements, network permeability, and speed. Compa ...
  • Methods To Identify Problematic Carriers and Prevent Infrastructure Damage
    Methods To Identify Problematic Carriers and Prevent Infrastructure Damage
    Gazzillo, Jennifer ;
    Riessman, Robin
    2024-03-01 | PDF
    Routinely collected Massachusetts data sets, including overweight permit applications and commercial truck inspections, are underused in safety and infrastructure analysis. Data warehousing and computing capabilities are advancing to allow live-time trend monitoring which could enhance enforcement efforts of overweight vehicles through proactive an ...
  • Partially Grouted Revetment for LowVolume Road Bridges Tech Transfer Summary
    Partially Grouted Revetment for Low-Volume Road Bridges [Tech Transfer Summary]
    Phares, Brent ;
    Alipour, Alice
    2024-03-01 | PDF
    The Iowa secondary road system has a large number of scour-susceptible bridges or bridges with unknown foundation conditions. While scour countermeasures have historically included conventional riprap, fully grouted riprap, and other systems, a promising option is a partially grouted revetment (also known as partially grouted riprap). Partially gro ...
  • Material Characterization and Determination of MEPDG Input Parameters for Indiana Superpave 5 Asphalt Mixtures
    Material Characterization and Determination of MEPDG Input Parameters for Indiana Superpave 5 Asphalt Mixtures
    Cho, Seonghwan ;
    Bagchi, Tandra
    2024-03-01 | PDF
    Superpave 5 (SP 5) has the ability to slow asphalt binder aging in asphalt pavements, which is why the SP 5 mix with optimum asphalt binder content to yield 5% air voids has recently been used in Indiana roads. INDOT also uses the AASHTOWare Pavement ME design software in pavement design, and the current asphalt aging prediction model in Pavement M ...
  • Development of a Formalized Program for InService Inspection of Pedestrian Bridges
    Development of a Formalized Program for In-Service Inspection of Pedestrian Bridges
    Alharthi, Aedh A ;
    Connor, Robert J.
    2024-03-01 | PDF
    Currently, there are no universally accepted procedures or criteria related to the inspection of pedestrian bridges in the U.S. While some states have some criteria in place, the FHWA has no specific recommendations or requirements for such structures. However, pedestrian bridges can be very complex structures in some cases, whether by using non-re ...
  • Asphalt Mixture Automated Testing System with Zero Intervention AMAZE Revised User Manual
    Asphalt Mixture Automated Testing System with Zero Intervention (AMAZE): Revised User Manual
    Zhou, Fujie ;
    Roa, Jorge
    2024-03-01 | PDF
    AMAZE is a cutting-edge solution designed to revolutionize the asphalt mixture testing process. The goal of the system is to increase consistency and accuracy of test results, eliminate human error, improve efficiency, and reduce testing times. AMAZE is engineered to automatically measure four essential asphalt mixture properties: bulk specific gra ...
  • Evaluation of NDOTs Sediment Barrier Practices Using Performance Data
    Evaluation of NDOT’s Sediment Barrier Practices Using Performance Data
    Perez, Michael A ;
    Donald, Wesley N.
    2024-03-01 | PDF
    To protect waterways adjacent to construction projects with disturbed land, a 50 ft (15 m) vegetated buffer or equivalent sediment controls are required. However, there is little guidance on the effectiveness of vegetated buffers in removing sediment or how sediment barriers can aid shorter buffers or replace buffers. A modeling methodology was dev ...
  • Updating ArDOT Liquefaction Evaluation Procedures
    Updating ArDOT Liquefaction Evaluation Procedures
    Wood, Clinton M. ;
    Mitra, Suman
    2024-03-01 | PDF
    There is a significant amount of uncertainty when designing piles for bridge foundations in liquefiable soil. Currently, Arkansas Department of Transportation (ARDOT) engineers use a standard penetration test (SPT)-based liquefaction spreadsheet developed 10 years ago to evaluate liquefaction triggering. Since this spreadsheet was developed, update ...
  • Designing an Autonomous Service to Cover Transits Last Mile in LowDensity Areas
    Designing an Autonomous Service to Cover Transit’s Last Mile in Low-Density Areas
    Khani, Alireza ;
    Aalipour, Ali
    2024-03-01 | PDF
    Public transportation provides a safe, convenient, affordable, and environmentally friendly mobility service. However, due to its fixed routes and limited network coverage, it is sometimes difficult or impossible for passengers to walk from a transit stop to their destination. This inaccessibility problem is also known as the “transit last-mile con ...
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