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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 1621 - 1640 of 36104 results
  • Developing a Performance Evaluation Facility for Sediment Control Devices
    Developing a Performance Evaluation Facility for Sediment Control Devices
    McFalls, Jett ;
    Foster, Derrold
    2023-11-01 | PDF
    The U.S. Environmental Protection Agency requires efforts to reduce the amount of sediment generated (i.e., erosion control) and the off-site transport of sediment and construction-related chemicals (i.e., sediment and chemical control) at all construction sites. Sediment from construction sites represents the largest pollutant source among several ...
  • 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 ...
  • Enhanced Bridge Cost Estimating
    Enhanced Bridge Cost Estimating
    Eamon, Christopher D. ;
    Shinki, Kazuhiko
    2023-11-01 | PDF
    The primary objectives of this research were to: 1) develop an efficient and accurate method for bridge repair and replacement cost estimating; and 2) implement the developed method in a cost estimation worksheet; 3) provide an automated system that allows periodic updating of costs. To accomplish these objectives, several modeling approaches were ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • The Effect of Coefficient of Friction Between Rail Vehicle Wheels and Rail Track on Operation Power Consumption
    The Effect of Coefficient of Friction Between Rail Vehicle Wheels and Rail Track on Operation Power Consumption
    Mahamudin, Nur Shahibrahim ;
    Darsivan, Fadly Jashi
    2023-10-12 | PDF
    The daily cost of rail operation is increasing due to the increase of rail network size. Therefore, reduction in operation power consumption is important to rail operator in order to fully optimize the daily operation cost. Operation power consumption in rail operation can be divided into 80% traction power such as vehicle propulsion system and 20% ...
  • Data Management Mining and Inference for Bridge Monitoring
    Data Management, Mining, and Inference for Bridge Monitoring
    Rizzo, Piervincenzo ;
    Enshaeian, Alireza
    2023-10-04 | PDF
    According to the Federal Highway Administration (FHWA), there are over 600,000 highway bridges in the United States. Nationwide, the performance evaluation of bridges starts with the inspection of the bridge to determine the current condition. Inspections are conducted in accordance with the National Bridge Inspection Standards (NBIS). With more th ...
  • Pathways to Autonomy Supporting Youth Independent Mobility in Westlake Los Angeles
    Pathways to Autonomy: Supporting Youth Independent Mobility in Westlake, Los Angeles
    Nelischer, Claire ;
    Cuff, Dana
    2023-10-01 | PDF
    In this study, we use the concept of “sidewalk ecologies” to highlight the complex interaction between spatially situated social and material features of sidewalks that influence youth mobility. We use a range of interdisciplinary strategies, emphasizing youth-centered research methods and mapping to capture a rich portrait of the independent trave ...
  • 2023 Implementation Plan for the AASHTOWare Pavement ME Design Software
    2023 Implementation Plan for the AASHTOWare Pavement ME Design Software
    Von Quintus, Harold ;
    Sufian, Abu A
    2023-10-01 | PDF
    This report provides an updated implementation plan or Road Map for implementing the AASHTO Pavement ME Design (PMED) software for the Idaho Transportation Department (ITD). The initial Road Map to implement the PMED software was published in 2014. This document is an update and continuation of ITD’s plan based on the completed activities between 2 ...
  • Research and Findings on Roundabouts and Innovative Intersections for HighSpeed and Rural Locations
    Research and Findings on Roundabouts and Innovative Intersections for High-Speed and Rural Locations
    Brewer, Marcus A. ;
    Fitzpatrick, Kay
    2023-10-01 | PDF
    Texas has thousands of centerline-miles of high-speed roadways where access might traditionally have been restricted, but there are an increasing number of high-speed roadways that have at-grade intersections and driveways. Innovative intersection designs (e.g., j-turns, median U-turns) and modern roundabouts have been used to remove conflict point ...
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