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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 381 - 400 of 35438 results
  • Five County Association of Governments Regional Mobility Study
    Five County Association of Governments Regional Mobility Study
    Campoll, Christy
    2025-02-01 | PDF
    The purpose of the Five County Association of Governments (AOG) Regional Mobility Study is to identify options to meet the mobility needs of transportation-disadvantaged individuals in Beaver, Garfield, Iron, Kane, and Washington Counties. The research included a literature review; inventory of transportation providers in the Five County AOG region ...
  • Testing the Hurricane Evacuation Modeling Package HEMP Summary
    Testing the Hurricane Evacuation Modeling Package (HEMP) [Summary]
    Bian, Ruijie “Rebecca” ;
    Mitran, Elisabeta
    2025-02-01 | PDF
    This project studied if and how behavioral models and traffic simulation frameworks created beforehand could be used to predict hurricane evacuation patterns in a new storm setting, with the anticipation of being able to conduct a real-time simulation in the future. Using publicly available data, this study first created synthetic populations by ye ...
  • Bridge Pile Repair Using Underwater Fiberglass Reinforced Plastic FRP Jacket and Steel Reinforced Grout
    Bridge Pile Repair Using Underwater Fiberglass Reinforced Plastic (FRP) Jacket and Steel Reinforced Grout
    Schilling, William ;
    Rieckman, Brandon
    2025-02-01 | PDF
    This study explored the feasibility and acceptability of using stay in-place fiberglass reinforced plastic (FRP) jackets and underwater steel reinforced grout for timely bridge piling repairs in Minnesota without dewatering. One of the goals of the project was to determine the current state of practice to this corrosion repair and inspection by res ...
  • Utah Travel Models FreeFlow Speed Research
    Utah Travel Models Free-Flow Speed Research
    Hooper, Ivan ;
    Bassett, David
    2025-02-01 | PDF
    Utah’s six travel demand models (TDM) are essential tools for the state’s transportation planning. Virtually every transportation plan and environmental study uses the TDMs to develop and evaluate transportation solutions, making the TDMs the most important transportation planning tool in the state. Currently, all of the TDMs employ a similar metho ...
  • Testing the Hurricane Evacuation Modeling Package HEMP
    Testing the Hurricane Evacuation Modeling Package (HEMP)
    Bian, Ruijie “Rebecca”
    2025-02-01 | PDF
    This project studied if and how behavioral models and traffic simulation frameworks created beforehand could be used to predict hurricane evacuation patterns in a new storm setting, with the anticipation of being able to conduct a real-time simulation in the future. Using publicly available data, this study first created synthetic populations by ye ...
  • iBM Bridge Management Tool Brief
    i-BM: Bridge Management Tool [Brief]
    Banaei-Kashani, Farnoush ;
    Rens, Kevin
    2025-02-01 | PDF
    Bridges and culverts deteriorate with time and use. While in the past, various data-driven deterioration models, including Bayesian models, probit model, and Markov chains are proposed in the literature to model bridge deterioration, these models either suffer from low accuracy or are too complex to be applicable. Recently deep learning (DL) AI mod ...
  • Evaluation of Alabama Limestone Sources for Use as Pavement Aggregate Base
    Evaluation of Alabama Limestone Sources for Use as Pavement Aggregate Base
    Bowers, Benjamin F. ;
    Anderson, J Brian
    2025-02-01 | PDF
    In recent years, the number of requests for approval of locally mined lime rock in Alabama has increased due to potential economic benefits associated with its use. However, the potential moisture sensitivity of lime rock is a concern that has not been fully addressed as it can impact the long-term performance of pavements. The objective of this st ...
  • Project Summary Community Driven CAV
    Project Summary: Community Driven CAV
    Minnesota. Department of Transportation
    2025-02-01 | PDF
    We envisioned a project—a future—where the community is at the forefront of planning and implementation of new technology. Technologies are often developed by select companies and universities, and then tested in communities. Instead of leading with a solution, Community Driven CAV started by understanding community needs and assets, and then creat ...
  • Application of Cementitious Materials and Fiber Reinforcement to Enhance Lime Stabilization for Nebraska Shale Soils
    Application of Cementitious Materials and Fiber Reinforcement to Enhance Lime Stabilization for Nebraska Shale Soils
    Eun, Jongwan ;
    Kim, Seunghee
    2025-02-01 | PDF
    Lime stabilization is a widely used technique to improve weak subgrades; however, its effectiveness under freeze-thaw cycles remains a critical challenge. This study investigates the incorporation of cementitious materials and fiber to enhance the mechanical properties and environmental resistance of lime-stabilized soils under such conditions. Two ...
  • Consultant Support for Intelligent Compaction and PaverMounted Thermal Profiling Projects in 20242025
    Consultant Support for Intelligent Compaction and Paver-Mounted Thermal Profiling Projects in 2024-2025
    Chang, George K ;
    Gilliland, Amanda
    2025-02-01 | PDF
    The 2024 MoDOT IC-PMTP Annual Report highlights achievements and challenges in implementing Intelligent Compaction (IC) and Paver-Mounted Thermal Profiling (PMTP) technologies. Key updates included aligning data validation tools with updated PMTP specifications and addressing challenges such as contractor’s paving boundary data manipulation and dat ...
  • Capturing Transit Rider Perspectives on Safety and Harassment Lessons from San Francisco
    Capturing Transit Rider Perspectives on Safety and Harassment: Lessons from San Francisco
    Wasserman, Jacob L. ;
    Brozen, Madeline
    2025-02-01 | PDF
    Personal safety concerns continue to be one of the most critical issues among transit riders and women and gender minorities in particular. These safety concerns stem from the experience of sexual harassment that people who identify as women face frequently. While harassment can be a common occurrence, the vast majority of these experiences go unre ...
  • Use of Geothermal Energy for DeIcing Approach Pavement Slabs and Bridge Decks Phase II
    Use of Geothermal Energy for De-Icing Approach Pavement Slabs and Bridge Decks – Phase II
    Yu, Xinbao ;
    Puppala, Anand J.
    2025-02-01 | PDF
    Bridges in many parts of Texas are prone to icing on the bridge deck during winter events, which poses severe travel disruptions and potential accidents to the drivers. Therefore, bridge deicing is critical to ensure roadway safety, mobility, and productivity reasons. This study tested and implemented a geothermal bridge deicing system (GBDS) as a ...
  • Organization and Analysis of Measurement While Drilling MWD Data
    Organization and Analysis of Measurement While Drilling (MWD) Data
    Link, Curtis A ;
    Barrick, David J.
    2025-02-01 | PDF
    The scope of the MDT funded research project highlighted collection and organization of data onto a portal, data review and quality control and analysis of relationships between MWD drilling parameters and rock properties. Our initial approach was investigation of traditional linear correlations between individual MWD drilling parameters and rock p ...
  • 2024 GDOT Employee Survey
    2024 GDOT Employee Survey
    Durham, Stephan A. ;
    DeMeester, Karen
    2025-02-01 | PDF
    The research team which included faculty from University of Georgia’s College of Engineering and Carl Vinson Institute of Government worked in collaboration with the Georgia Department of Transportation (GDOT) to conduct the 2024 GDOT employee survey. This research study aimed to increase the response rate and the usefulness of the feedback from th ...
  • Interlaboratory Study for the Indirect Tensile at High Temperature Test and Ideal Rutting Test
    Interlaboratory Study for the Indirect Tensile at High Temperature Test and Ideal Rutting Test
    Boz, Ilker ;
    Diefenderfer, Stacey D.
    2025-02-01 | PDF
    The Indirect Tensile at High Temperature (IDT-HT) test and Ideal Rutting (IR) test were recommended for screening rut-susceptible asphalt mixtures in the Balanced Mix Design (BMD) process, based on a research study by the Virginia Transportation Research Council (VTRC). The Virginia Department of Transportation (VDOT) is in the initial stages of im ...
  • Development of Procedures and Technologies for Chip Seal Construction Quality Control in Oregon
    Development of Procedures and Technologies for Chip Seal Construction Quality Control in Oregon
    Baran, Servan ;
    Sukhija, Mayank
    2025-02-01 | PDF
    Given budget constraints and increasing traffic in Oregon, chip seals have emerged as a cost-effective and practical approach for maintaining and preserving the existing highway network. This study focused on establishing efficient Quality Assurance (QA) procedures for chip seals, aligning with SPR777's design method to increase the performance and ...
  • Pavement Rehabilitation and Design Strategy for Heavy Loads in the Energy Development Areas
    Pavement Rehabilitation and Design Strategy for Heavy Loads in the Energy Development Areas
    Zhou, Fujie ;
    Scullion, Tom
    2025-02-01 | PDF
    In recent years, rapid energy development in Texas has caused significant damage to many farm-to-market (FM) roads, which traditionally have a thin asphalt surface layer plus a stabilized base directly over the subgrade. These FM roads performed well under normal traffic loads but failed dramatically under the energy-sector truck loads. There is an ...
  • Laboratory and Field Performance of PGXX28 and PGXX34 Binders and New Binder Type Selection Catalog
    Laboratory and Field Performance of PGXX-28 and PGXX-34 Binders and New Binder Type Selection Catalog
    Hu, Sheng ;
    Zhou, Fujie
    2025-02-01 | PDF
    Asphalt binder is one of the most expensive and critical materials used in the construction and maintenance of asphalt pavements. A key step toward a long-lasting asphalt pavement is selecting a proper binder performance grade (PG). The Texas Department of Transportation’s current binder PG selection catalog serves its purpose well for new pavement ...
  • Assessing the Deterioration of Pedestrian Assets
    Assessing the Deterioration of Pedestrian Assets
    Nlenanya, Inya ;
    Smadi, Omar G.
    2025-02-01 | PDF
    Pedestrian assets, particularly sidewalks, are highly susceptible to aging, adverse weather conditions, and suboptimal construction practices, often leading to rapid deterioration. This deterioration is often ignored due to the widespread misconception that pedestrian assets are low risk, resulting in many deteriorated sidewalks being left untreate ...
  • Effects of Additives in Deicing Salts at Lower Temperatures
    Effects of Additives in Deicing Salts at Lower Temperatures
    Fay, Laura ;
    Jamal, Mueed
    2025-02-01 | PDF
    The goal of this project was to investigate the effects of additives commonly used in deicers for winter road maintenance operations, explore the qualitative and quantitative benefits of these additives, laboratory and performance data, impacts, and relative performance to sodium chloride (NaCl). Additionally, evaluate the impact additives have on ...
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