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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 2541 - 2560 of 36114 results
  • Calibrating the Highway Safety Manual Predictive Methods for Texas Highways Summary
    Calibrating the Highway Safety Manual Predictive Methods for Texas Highways [Summary]
    Geedipally, Srinivas R.
    2022-08-31 | PDF
    The Highway Safety Manual (HSM) contains safety performance functions (SPFs) that are used in project-level decision-making to estimate the average crash frequency by severity level for existing conditions, alternatives to existing conditions, or proposed new roadways. Because most existing HSM SPFs were developed for states other than Texas, SPF c ...
  • Synthesis of Automated Pedestrian Data Collecting Techniques and Applications in Transportation Planning Design and Management Project Summary
    Synthesis of Automated Pedestrian Data Collecting Techniques and Applications in Transportation Planning, Design, and Management [Project Summary]
    Perrine, Kenneth A. ;
    Haddad, Angela
    2022-08-31 | PDF
    In this project, researchers undertook a comprehensive literature review on the state-of-the-art and state-of-the-practice of manual and automated pedestrian data collection techniques. They assessed different automated data collection methods, including well-established and emerging AI- and sensor-based technologies, to evaluate their appropriaten ...
  • Determine Drainage Basin Mapping and Estimation of Hydroplaning Potential Project Summary
    Determine Drainage Basin Mapping and Estimation of Hydroplaning Potential [Project Summary]
    Gurganus, Charles ;
    Devadas, Arvind
    2022-08-31 | PDF
    The purpose of this project was to use mobile light detecting and ranging (LiDAR) measurements to measure surface geometry to map drainage basins on the pavement surface. Mobile LiDAR was used to collect measurements at highway speeds. Using mobile LiDAR technology fostered safety during data collection and provided a dense dataset over the roadway ...
  • Implementation of Automatic Traffic Signals Performance Measures Summary Report
    Implementation of Automatic Traffic Signals Performance Measures: Summary Report
    Sunkari, Srinivasa R ;
    Chaudhary, Nadeem
    2022-08-31 | PDF
    The scope of this project was to develop draft specifications of an ATSPM system for statewide deployment. These draft specifications will be used to develop formal specifications for the Texas Department of Transportation (TxDOT) to procure and deploy an ATSPM system. This project also aimed to develop guidelines for local agencies about making de ...
  • Synthesis for Best Practices for Developing 4Year Pavement Management Plans Summary
    Synthesis for Best Practices for Developing 4-Year Pavement Management Plans [Summary]
    Gurganus, Charles ;
    Goehl, Darlene
    2022-08-31 | PDF
    This project investigated and synthesized best practices for the development and execution of 4-year pavement management plans (PMPs) within the Texas Department of Transportation. Successful 4-year PMPs help provide the traveling public with a safe, comfortable, and reliable roadway network.
  • Optimizing Reinforcing Steel in 12inch and 13inch Continuously Reinforced Concrete Pavement CRCP Project Summary
    Optimizing Reinforcing Steel in 12-inch and 13-inch Continuously Reinforced Concrete Pavement (CRCP) [Project Summary]
    Won, Moon ;
    Bae, Sang Wook
    2022-08-30 | PDF
    Researchers analyzed the structural responses of CRCP using three-dimensional finite element modeling (3D-FEM) in Ansys at the depth of the longitudinal steel at transverse crack areas with various steel designs which, if excessive, could cause horizontal cracks. The output was used in selecting the steel designs that will be employed at the experi ...
  • Flood Mitigation Solutions
    Flood Mitigation Solutions
    Starkey, Richard ;
    Smith, Virginia
    2022-08-29 | PDF
    In Pennsylvania DOT District 6 expanding watershed development is increasing demands on roadways and worsening flooding. This research addresses the fundamental question: “How can flood mitigation improve the safety and sustainability of a road network?” While many studies have sought to understand the impacts of hydrologic events on driving condit ...
  • Illinois Highway Materials Sustainability Efforts 2021
    Illinois Highway Materials Sustainability Efforts 2021
    Morse, Kelly L.
    2022-08-24 | PDF
    The Illinois Department of Transportation (IDOT) continues to use a variety of reclaimed and recycled materials in highway construction. Recycled materials are used in highway construction to supplement aggregates, concrete, hot-mix asphalt (HMA), steel, and sealants, as well as for soil modification and pavement markings. This report summarizes th ...
  • Developing Countermeasures to Decrease Pedestrian Deaths
    Developing Countermeasures to Decrease Pedestrian Deaths
    Kockelman, Kara M. ;
    Perrine, Kenneth A.
    2022-08-01 | PDF
    In efforts to reverse the rising rate of pedestrian-related crashes in Texas, researchers analyze crash data to determine common causes and effective countermeasures. Extensive use of visualizations, regression models, advanced tree-based analysis, and geographic information system (GIS)-based data management adds insight. Significant variables inc ...
  • Development of a PerformanceRelated Test for Designing Seal Coats Project Summary
    Development of a Performance-Related Test for Designing Seal Coats [Project Summary]
    Bhasin, Amit ;
    Adwani, Dheeraj
    2022-08-01 | PDF
    The researchers investigated the effects of several influencing factors on the performance of seal coats based on a thorough literature review and a survey of TxDOT and other state DOT personnel. They evaluated tests that could be used to measure the binder-aggregate compatibility and adhesion. The study used modifications of a Sweep test and Viali ...
  • The State of Practice in Community Impact Assessment
    The State of Practice in Community Impact Assessment
    Barajas, Jesus M. ;
    Braun, Lindsay M
    2022-08-01 | PDF
    The objective of this research was to provide recommendations to the Illinois Department of Transportation for updating and revising the “Community Impact Assessment Manual” in accordance with the latest research and practice. The guide incorporated findings from a literature review, a scan of state department of transportation (DOT) community impa ...
  • Assessment Repair and Replacement of Bridges Subjected to Fire
    Assessment, Repair, and Replacement of Bridges Subjected to Fire
    Dahlberg, Justin ;
    Phares, Brent M.
    2022-08-01 | PDF
    Although bridge fires are not frequent events, they pose impacts on safety, traffic flow, and the economy given bridge repairs or replacement can be costly. A lack of information and the tools needed to evaluate fire damage to concrete bridges and to aid in decisions for both immediate and long-term use of fire-damaged bridges was the impetus for t ...
  • GFRP Reinforced Bridge Barriers Numerical Modeling
    GFRP Reinforced Bridge Barriers: Numerical Modeling
    Wei, Congjie ;
    Myers, John
    2022-08-01 | PDF
    The reported work enclosed the numerical modeling of GFRP reinforced concrete bridge barrier under static and impact load. The GFRP configurations were designed to fit into the existing MoDOT Type D barrier structures. The constructability of the GFRP reinforcement was also taken into consideration. Both static and dynamic loading were modeled to e ...
  • Estimating Soil Pressure Against Unyielding Surfaces
    Estimating Soil Pressure Against Unyielding Surfaces
    Rodgers, Michael ;
    McVay, Michael
    2022-08-01 | PDF
    This report focuses on the earth pressures that develop when two MSE walls are tied together, creating an unyielding condition. During the research an extensive literature review was completed that included current design practices and standards, and construction and quality control procedures. This ensured the constructed wall configurations adher ...
  • RiskBased Inspection
    Risk-Based Inspection
    Cai, Hubo ;
    Zhang, Yuxi
    2022-08-01 | PDF
    Construction inspection is a critical component of the quality assurance/quality control (QA/QC) program at the South Carolina Department of Transportation (SCDOT). A pressing challenge SCDOT has been facing is to balance the increasing demand to rebuild the statewide transportation systems with declining resources available for inspection. This pr ...
  • Steering Californias Transportation Future A Report on Possible Scenarios and Recommendations
    Steering California's Transportation Future: A Report on Possible Scenarios and Recommendations
    Gahbauer, John ;
    Matute, Juan
    2022-08-01 | PDF
    To investigate possible future transportation and land use scenarios for California as well as their likely precipitating policies and potential consequences, we convened a panel of 18 experts and used a novel variation of the Delphi method to systematically explore four specific scenarios and probe the desirability and likelihood of each. The scen ...
  • MiniRWIS PILOT PROJECT 2020 2022 A PublicPrivate Partnership Demonstration Project Between Campbell Scientific Inc and the Alaska Department of Transportation Public Facilities in Collaboration With the University of Alaska Fairbanks Institute of Northern Engineering and GeoWatersheds Scientific
    Mini-RWIS PILOT PROJECT (2020 – 2022): A Public-Private Partnership Demonstration Project Between Campbell Scientific, Inc. and the Alaska Department of Transportation & Public Facilities in Collaboration With the University of Alaska Fairbanks (Institute of Northern Engineering) and Geo-Watersheds Scientific
    Randall, Kevin ;
    Connor, Billy
    2022-08-01 | PDF
    In 2019, Campbell Scientific, a manufacturer of research-grade data acquisition systems entered a public/private partnership project with the Alaska Department of Transportation and Public Facilities (ADOT&PF) to demonstrate the scalable (mini) Road Weather Information System (RWIS) concept. This partnership included research personnel from the Uni ...
  • Policies and Design Guidelines To Plan for Connected and Autonomous Vehicles
    Policies and Design Guidelines To Plan for Connected and Autonomous Vehicles
    Benkraouda, Ouafa ;
    Braun, Lindsay Maurer
    2022-08-01 | PDF
    This report chronicles the work undertaken by researchers at the University of Illinois Urbana Champaign to identify policies and design guidelines to plan for connected and autonomous vehicles (CAVs) in mid-sized regions in Illinois. The report starts with the goals of this work followed by a review of existing literature. The review addresses CAV ...
  • Implementation of Improved Performance Grade PG of Asphalt Binders Final Report
    Implementation of Improved Performance Grade (PG) of Asphalt Binders: Final Report
    Filonzi, Angelo ;
    Mohanraj, Kiran
    2022-08-01 | PDF
    Given the importance of the quality of asphalt binder in resisting crack growth in asphalt mixtures, there is a critical need for a simple and accurate test to evaluate the cracking resistance of asphalt binders. Most current tests are based on rheological indices and do not induce cracking in asphalt binders. Researchers have developed a simple “p ...
  • Detecting Foundation Pile Length of HighMast Light Towers
    Detecting Foundation Pile Length of High-Mast Light Towers
    Kennedy, Daniel ;
    D’Agostino, Mollie
    2022-08-01 | PDF
    The goal of the project is to establish a non-destructive field testing technique, including a data analysis algorithm, for determining in-place pile lengths by way of seismic waves. The length of each pile supporting a high-mast light tower (HMLT) will be identified through a systematic sensing approach that includes (i) collection and classificat ...
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