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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 601 - 620 of 36053 results
  • 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 ...
  • Investigation of Commercial Motor Vehicle CMVRelated Crashes in Ohio Work Zones
    Investigation of Commercial Motor Vehicle (CMV)-Related Crashes in Ohio Work Zones
    Finley, Melisa D. ;
    Lopez, Nicholas
    2025-02-01 | PDF
    This research project was conducted to identify causation trends and factors that contribute to commercial motor vehicle (CMV)-involved work zone crashes in Ohio. In addition, the research project examined how workspace access points contribute to the CMV crash risk in work zones. In Phase 1, the research team reviewed previous research findings, c ...
  • 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 ...
  • HighSpeed Faulting Measuring Device for Jointed Concrete Pavements
    High-Speed Faulting Measuring Device for Jointed Concrete Pavements
    Li, Ruohan ;
    Hernandez, Joaquin B.
    2025-02-01 | PDF
    Current equipment to measure faulting of jointed concrete pavements at the network level is ineffective and inefficient. One the one hand, joint detection at high speeds is challenging. On the other hand, the actual measurement is not accurate and fails to capture the transverse variability of faulting. In this project, a high- definition, high-spe ...
  • FiberReinforced Concrete Overlays for Bridge Structures
    Fiber-Reinforced Concrete Overlays for Bridge Structures
    Ozyildirim, H. Celik ;
    Sharifi, Mary
    2025-02-01 | PDF
    The common distresses in bridge decks are the loss of surface texture due to traffic and poor construction practices that result in cracks and spalls because of the reinforcement corroding. The common repair procedure for such distresses is removing the top surface of the deteriorated concrete and placing a low-permeability concrete overlay. Someti ...
  • Suitability of Using Crushed Concrete Adjacent to Geotextiles in Underdrain Systems Second Phase Field Trial Before Implementation
    Suitability of Using Crushed Concrete Adjacent to Geotextiles in Underdrain Systems Second Phase: Field Trial Before Implementation
    Tanyu, Burak F ;
    Abbaspour, Aiyoub
    2025-02-01 | PDF
    Due to the increasing interest in the use of recycled concrete as a base course aggregate, the Virginia Department of Transportation (VDOT) identified the need for an in-depth research investigate the clogging potential of the geotextile used in highway edge drains if crushed hydraulic cement concrete (CHCC) is placed adjacent to the drainage fabri ...
  • A Roadmap for Missouri Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations Summary
    A Roadmap for Missouri: Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations [Summary]
    Kevern, John T. ;
    Buttlar, William G.
    2025-02-01 | PDF
    This report details the Missouri Department of Transportation’s activities within the Federal Highway Administration’s Climate Challenge program. The purpose of the program was three-fold, 1) to increase knowledge of environmental product declarations (EPDs) within the Missouri asphalt and concrete industry, 2) to assess the current state of Missou ...
  • Design and Demonstration of an ArterialFriendly Local Ramp Metering Control System Research Summary
    Design and Demonstration of an Arterial-Friendly Local Ramp Metering Control System [Research Summary]
    Liu, Yi
    2025-02-01 | PDF
    This project aims to develop, assess, and optimize control strategies for ramp metering and local signal synchronization in Maryland's Transportation Systems Management and Operations (TSMO) 1 system (I-70 corridor east of Baltimore, MD). The methodology and mesoscopic simulation model can be generally applicable to other networks and TSMO systems.
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • A Roadmap for Missouri Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations
    A Roadmap for Missouri: Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations
    Kevern, John T. ;
    Buttlar, William G.
    2025-02-01 | PDF
    This report details the Missouri Department of Transportation’s activities within the Federal Highway Administration’s Climate Challenge program. The purpose of the program was three-fold, 1) to increase knowledge of environmental product declarations (EPDs) within the Missouri asphalt and concrete industry, 2) to assess the current state of Missou ...
  • Effectiveness of Short Solid Barriers to Reduce Noise Generated by Different Types of Highway Vehicles Research Summary
    Effectiveness of Short Solid Barriers to Reduce Noise Generated by Different Types of Highway Vehicles [Research Summary]
    Owolabi, Oludare
    2025-02-01 | PDF
    The purpose of this study was to determine how well short concrete barriers work to reduce noise from passing cars. The goal was to give the State Highway Administration (SHA) information so they could determine if these barriers could be utilized to reduce traffic noise.
  • Development of a Traffic Management Decision Support Tool for Freeway Incident Traffic Management FITM Plan Deployment Phase 3 An Incident Duration and Impact Prediction IDIP System Research Summary
    Development of a Traffic Management Decision Support Tool for Freeway Incident Traffic Management (FITM) Plan Deployment Phase 3: An Incident Duration and Impact Prediction (IDIP) System [Research Summary]
    Chang, Gang-Len
    2025-02-01 | PDF
    The primary goal of this study is to finalize the IDIP system’s development so that CHART can reliably project the impacts of a detected incident, from detection to clearance, on its target freeway and neighboring local networks. With all essential functions developed in this phase for IDIP, CHART’s incident response team can conveniently estimate ...
  • iBM An Intelligent Bridge Management Tool for Bridge and Culvert Deterioration Forecasting and Anomaly Detection Based on PhysicsGuided Deep Learning
    i-BM: An Intelligent Bridge Management Tool for Bridge and Culvert Deterioration Forecasting and Anomaly Detection Based on Physics-Guided Deep Learning
    Banaei-Kashani, Farnoush ;
    Rens, Kevin
    2025-02-01 | PDF
    Bridges and culverts deteriorate with time and use. The deterioration process is affected by several factors, such as structural materials, structural design and behavior, daily traffic, freeze and thaw cycles, climate, pollution, temperature variation. After a certain period of time has elapsed, the deterioration processes accelerate and in a rela ...
  • 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 ...
  • Central Dakota 2025 Base Travel Demand Model Development and Calibration
    Central Dakota 2025 Base Travel Demand Model Development and Calibration
    Motuba, Diomo
    2025-02-01 | PDF
    The Central Dakota MPO, which includes the cities of Minot, Surrey, and Burlington, has been developing a Travel Demand Model (TDM) to incorporate new data, reflect current travel patterns, and integrate advancements in transportation modeling techniques. The updated model is based on 2024 data, ensuring that it accurately represents the region's t ...
  • 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 ...
  • Examination of Lighting Practices at Crosswalks
    Examination of Lighting Practices at Crosswalks
    Van Houten, Ron ;
    Kwigizile, Valerian
    2025-01-31 | PDF
    Following a review of the lighting literature and new lighting products, this study examined the lighting level at the location of night fatal and incapacitating (K&A) pedestrian crashes over a 5-year period in SW & SE Michigan. Not surprisingly, the results revealed that almost all the night pedestrian crashes coded on police reports as occurring ...
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