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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 1501 - 1520 of 35865 results
  • Bridge and Culvert Designs for Reduced WildlifeVehicle Conflicts and Improved Climate Resiliency Phase I
    Bridge and Culvert Designs for Reduced Wildlife-Vehicle Conflicts and Improved Climate Resiliency: Phase I
    Gómez, Alejandra ;
    Maerz, John
    2023-11-01 | PDF
    Wildlife vehicle conflicts (WVC) average over 14,000 crashes and cost more than $850M per year in Georgia (FHWA 2023). Our research team has undertaken a Phase I study to identify opportunities to simultaneously improve road safety, reduce wildlife vehicle conflicts (WVC), effectively ensure water and debris conveyance capacity, enhance ecosystem c ...
  • Division of Engineering Research on Call Agreement 34652 Task 12 Change Detection of Inventoried Landslides Using Remote Sensing Techniques
    Division of Engineering Research on Call, Agreement 34652. Task 12, Change Detection of Inventoried Landslides Using Remote Sensing Techniques
    Bassal, Patrick ;
    Athar, M Faraz
    2023-11-01 | PDF
    This study evaluates the effectiveness of utilizing remotely sensed three-dimensional (3D) spatial data, including Light Detection and Ranging(lidar) and Interferometric Synthetic Aperture Radar (InSAR) for interpreting change detections of eastern Ohio (Districts 5, 10, and 11) landslides. The performance of lidar methods used by specialty firm Te ...
  • Evaluation of Netfree Erosion Control Blankets
    Evaluation of Net-free Erosion Control Blankets
    Bhattarai, Rabin ;
    Zhang, Yufan
    2023-11-01 | PDF
    Erosion control blankets (ECBs) protect soil from being detached and transported by raindrops and subsequential overland runoff while assisting in vegetation growth. ECBs have several characteristics, for example, thickness, mass per unit area, tensile strength, elongation, water absorption, etc. However, the impact of these characteristics on the ...
  • BMP For Issues with Asphalt Centerline Joint and Intelligent Compaction for Local Agencies
    BMP For Issues with Asphalt Centerline Joint and Intelligent Compaction for Local Agencies
    Haider, Syed W. ;
    Muslim, Hamad Bin
    2023-11-01 | PDF
    It is well-known that longitudinal joint construction quality is critical to flexible pavement life. The maintenance activities caused by longitudinal joint deterioration's direct or indirect effects and raveling problems along the centerline paving joint of asphalt roadways have become challenging for many highway agencies. A poorly constructed jo ...
  • Evaluation of NearMiss Crashes Using a VideoBased Tool Summary
    Evaluation of Near-Miss Crashes Using a Video-Based Tool [Summary]
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2023-11-01 | PDF
    This research investigated the prediction accuracy of a video-based tool developed by Transoft Solutions for predicting near-miss crashes at signalized intersections. The research team selected two signalized intersections in Overland Park, Kansas, and collected two weeks of video data from both locations. Only weekday data were collected for the t ...
  • A Synthesis of Economic Impact Assessment of Transit Services
    A Synthesis of Economic Impact Assessment of Transit Services
    Peng, Zhong-Ren ;
    Liu, Yanghe
    2023-11-01 | PDF
    This report provides an in-depth synthesis of the economic impact assessment of transit services in the United States from 2003 to 2023, focusing on Benefit-Cost Analysis (BCA) and Economic Impact Analysis (EIA) methodologies. It examines their application in public transit systems and highlights geographical variations and trends. The report analy ...
  • Delivering Results for America USDOT Progress Report 20212023
    Delivering Results for America: USDOT Progress Report: 2021-2023
    United States. Department of Transportation
    2023-11-01 | PDF
    Update on the work and accomplishments of the United States Department of Transportation from 2021-2023.
  • Bond Behavior of EpoxyCoated Reinforcing Bars in NonProprietary UHPC
    Bond Behavior of Epoxy-Coated Reinforcing Bars in Non-Proprietary UHPC
    Darwin, David ;
    O’Reilly, Matthew
    2023-11-01 | PDF
    Non-proprietary ultra-high-performance concrete (UHPC) mixtures were developed for use in closure strips between precast members on reinforced concrete bridges. The mixtures contained ODOT approved Type I portland cement, slag cement, silica fume, graded fine aggregate, two high-range water-reducers (HRWRs), one of which incorporated a viscosity mo ...
  • Driver Behavior and Performance in HightoLow Speed Transition Zones
    Driver Behavior and Performance in High-to-Low Speed Transition Zones
    Srinivasan, Raghavan ;
    Chakraborty, Meghna
    2023-11-01 | PDF
    This study compiled site characteristics from 338 transition zones in North Carolina. Out of these locations, speed data were compiled from 50 locations (for 37 locations, speed data were compiled in the field; for the remaining 13 locations, INRIX was used to compile the data). These 50 locations represented 9 different categories of speed limit t ...
  • LargerDiameter Shear Studs for Composite Steel Bridges
    Larger-Diameter Shear Studs for Composite Steel Bridges
    Deng, Xianjue ;
    Wan, Lu
    2023-10-31 | PDF
    Composite steel bridge girders are typically constructed using 7/8″ diameter shear studs. A large number of shear studs is often needed to satisfy AASHTO shear stud fatigue and strength requirements. Using a larger diameter shear stud can significantly reduce the required number of shear studs which in turn can improve construction worker safety, e ...
  • Use of LargerDiameter Shear Studs for Composite Steel Bridges Project Summary
    Use of Larger-Diameter Shear Studs for Composite Steel Bridges [Project Summary]
    Deng, Xianjue ;
    Wan, Lu
    2023-10-31 | PDF
    The research included preliminary design studies to quantify the reduction in the number of shear studs that can be achieved with larger-diameter shear studs. This was followed by an extensive investigation of stud welding, followed by push-out tests to evaluate the static and fatigue performance of larger-diameter shear studs. Parametric finite el ...
  • Vessel Electrification Investigation for the NCDOT Ferry Division Fleet
    Vessel Electrification Investigation for the NCDOT Ferry Division Fleet
    Hildreth, John ;
    Karayaka, Bora
    2023-10-31 | PDF
    Ferry electrification is a growing domestic and global trend, driven by an interest in reducing operational and maintenance costs, and mitigating emissions at ports. Ferries are particularly well suited for electrification due to their relatively short travel distances over fixed routes, predictable schedule, and their ample onboard space for batte ...
  • Develop Standards for Temporary Concrete Median Barrier in FloodProne Areas Project Summary
    Develop Standards for Temporary Concrete Median Barrier in Flood-Prone Areas [Project Summary]
    Bligh, Roger ;
    Silvestri-Dobrovolny, Chiara
    2023-10-31 | PDF
    The objective of this project was to develop a hydraulically efficient portable concrete barrier (PCB) that complies with the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH).
  • Exploring the Use of Artificial Intelligence to Leverage TxDOT Data for Enhanced Corridor Management and Operations Project Summary
    Exploring the Use of Artificial Intelligence to Leverage TxDOT Data for Enhanced Corridor Management and Operations [Project Summary]
    Juri, Natalia Ruiz ;
    Perrine, Ken
    2023-10-31 | PDF
    This project explored the use and value of AI and ML in transportation taking a multi-pronged approach that includes a literature review, a workshop, a survey, the development of three prototype ML models for four high-priority use cases, and the field testing of one of the prototyped models. Initial tasks were exploratory in nature and led to a be ...
  • Roadside Safety Device Analysis Testing and Evaluation Program Project Summary Report
    Roadside Safety Device Analysis, Testing, and Evaluation Program [Project Summary Report]
    Bligh, Roger ;
    Cakalli, Sofokli
    2023-10-31 | PDF
    This project evaluated prioritized roadside safety issues and resulted in new or improved roadside safety devices. Devices found to be MASH compliant are suitable for implementation. Implementation of these roadside safety devices will improve motorist safety, reduce material and installation costs, and/or improve operations. These devices are bein ...
  • 07095 Evaluating Streamflow Measurement at TxDOT Bridges Summary
    0-7095: Evaluating Streamflow Measurement at TxDOT Bridges [Summary]
    Maidment, David ;
    Passalacqua, Paola
    2023-10-31 | PDF
    The Texas Department of Transportation (TxDOT) wishes to move from a reactive to a proactive response during flood emergency operations. Real-time flood map services provide valuable information for TxDOT flood decision making. The National Weather Service initiated the operation of real-time flood inundation maps for Texas in October 2023. The res ...
  • InService Performance Evaluation ISPE of New England Transportation Consortium NETC Steel Bridge Railings
    In-Service Performance Evaluation (ISPE) of New England Transportation Consortium (NETC) Steel Bridge Railings
    Carrigan, Christine E ;
    Plaxico, Chuck A.
    2023-10-27 | PDF
    The predominate bridge railing used in the New England States are two-, three-, and four-bar steel post-and-beam designs developed and crash tested under the auspices of the New England Transportation Consortium (NETC). These bridge railing designs are commonly referred to as NETC bridge railings. The crash tests were performed in compliance with t ...
  • Advanced Testing and Characterization of Iowa Soils and Geomaterials Tech Transfer Summary
    Advanced Testing and Characterization of Iowa Soils and Geomaterials [Tech Transfer Summary]
    Cetin, Bora ;
    Ceylan, Halil
    2023-10-22 | PDF
    Objectives • Evaluating the cross-anisotropic stiffness characteristics of Iowa soils and geomaterials through advanced cyclic true triaxial tests. • Evaluating the cross-anisotropic permanent deformation characteristics of Iowa soils and geomaterials through advanced cyclic true triaxial tests. • Determining the effect of freeze-thaw action on sti ...
  • Comprehensive Study on CMV Safety Using ITS in Work Zones on Freeways and Arterials
    Comprehensive Study on CMV Safety Using ITS in Work Zones on Freeways and Arterials
    Jeihani, Mansoureh ;
    Khadem, Nashid
    2023-10-20 | PDF
    Work zones pose significant safety challenges on highways, with Commercial Motor Vehicles (CMVs) being particularly susceptible to higher risk due to their larger size, slower acceleration/deceleration rates, and expanded blind spots. This study aimed to assess the impact of various work zone warning measures on the driving behavior of CMV operator ...
  • Hamilton Neighborhood Traffic Circle Traffic Calming Project June 1st October 15th 2023
    Hamilton Neighborhood Traffic Circle Traffic Calming Project: June 1st – October 15th, 2023
    Madsen, Matthew ;
    Gleason, Rebecca
    2023-10-15 | PDF
    The Western Transportation Institute (WTI) has been communicating with Bike Walk Montana and the Montana Department of Commerce’s Main Street Program to assist small towns with pop-up projects aimed at slowing traffic to create safer streets. The Department of Commerce reached out regarding opportunities for pop-up traffic calming in Hamilton, Mont ...
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