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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 1041 - 1060 of 36841 results
  • Evaluation of Greenhouse Gas Emissions Reductions Due to Vermonts Clean Vehicle Incentive Programs Fact Sheet
    Evaluation of Greenhouse Gas Emissions Reductions Due to Vermont’s Clean Vehicle Incentive Programs [Fact Sheet]
    Rowangould, Dana ;
    Rowangould, Gregory
    2025-01-01 | PDF
    This project uses information about Vermont’s incentives and detailed vehicle records to evaluate who received incentives and the performance of Vermont’s clean transportation incentive programs in terms of greenhouse gas emissions (GHGs), cost effectiveness, and equity.
  • Automated Record Keeping for Maintenance Operations via Tracking of Maintenance Vehicles Using Telematics Tracks Summary
    Automated Record Keeping for Maintenance Operations via Tracking of Maintenance Vehicles Using Telematics Tracks [Summary]
    Krogmeier, James V. ;
    Zhang, Yaguang
    2025-01-01 | PDF
    Efficient and accurate record-keeping for maintenance vehicle operations is essential for optimizing resources, improving accountability, and enhancing decision-making for transportation agencies. The Indiana Department of Transportation (INDOT) sought an automated system to verify and improve work order records using telematics-based vehicle track ...
  • Advancing Accelerated Bridge Construction and Fabrication in Indiana Summary
    Advancing Accelerated Bridge Construction and Fabrication in Indiana [Summary]
    Thrall, Ashley P.
    ORCID ICON IMG
    2025-01-01 | PDF
    The aim of this research was to increase the use of the accelerated bridge construction (ABC) and accelerated bridge fabrication (ABF) in Indiana. Specific research objectives included: (1) understand barriers to implementing ABC and evaluate ABF capabilities in Indiana, (2) investigate the benefits and limits of various ABC/ABF strategies specific ...
  • Supplemental Data Collection and Processing for Bridge Safety Inspections Utilizing Mixed Reality and Artificial Intelligence
    Supplemental Data Collection and Processing for Bridge Safety Inspections Utilizing Mixed Reality and Artificial Intelligence
    Sarlo, Rodrigo ;
    Gabbard, Joseph
    2025-01-01 | PDF
    This research work focused on evaluating both the technical and design elements necessary to perform augmented reality (AR) assisted bridge inspections. The inspection prototype developed by this project aims to demonstrate the potential benefits and limitations of incorporating head-worn displays into the inspection workflow. By virtue of switchin ...
  • Artificial Intelligence and Its Role and Use Within State DOTs Technical Summary
    Artificial Intelligence and Its Role and Use Within State DOTs [Technical Summary]
    Egge, Mark ;
    Rupnow, Tyson
    2025-01-01 | PDF
    The research team planned and executed this project in two phases. The project began with foundational research and a literature review, during which the team compiled a broad catalog of practical AI applications. A practitioner-focused phase followed, drawing out real-world insights related to AI policy and implementation. The research team implem ...
  • Truck Parking Shortage Improving Efficiency and Identifying Opportunities Technical Summary
    Truck Parking Shortage: Improving Efficiency and Identifying Opportunities [Technical Summary]
    Stich, Bethany ;
    Mallum, Faisal
    2025-01-01 | PDF
    This study addressed truck parking issues and provides both short- and long-term solutions. The long-term solution is to develop guidance for truck parking ordinances that local jurisdictions are willing to adopt and to help build more truck parking spaces. The short-term solution is to identify what truck parking exists, how it is managed, and whe ...
  • Improving Cost Estimation and Budget Planning with New Michigan Highway Construction Cost Index
    Improving Cost Estimation and Budget Planning with New Michigan Highway Construction Cost Index
    Liu, Hexu ;
    Kwigizile, Valerian
    2024-12-31 | PDF
    Accurate cost estimation plays a pivotal role in effective budget planning for highway construction projects, ensuring that resources are allocated appropriately and projects are completed within financial constraints. Traditional cost estimation methods, commonly used by transportation agencies like the Michigan Department of Transportation (MDOT) ...
  • 07090 Evaluate the Deployment of High Strength Reinforcing Steel in Texas
    0-7090: Evaluate the Deployment of High Strength Reinforcing Steel in Texas
    Yu, Yongjae ;
    Espanol, Cheska
    2024-12-31 | PDF
    High-strength reinforcing steel has been incorporated into design specifications and permitted under certain provisions of concrete building and bridge design codes, highlighting its growing recognition in construction. The employment of high-strength reinforcing bars offers several potential advantages, including reduced reinforcement quantities, ...
  • Mitigation of End Zone Cracking in Prestressed Concrete Girders
    Mitigation of End Zone Cracking in Prestressed Concrete Girders
    Kim, Yail Jimmy
    2024-12-31 | PDF
    This report presents two major aspects related to the end-zone behavior of prestressed concrete bulb-tee girders: i) laboratory experiments and ii) full-scale finite element modeling. The first part of the report discusses the behavior of anchorage zones, also known as end zones, with discrete rebars and continuous meshes. To examine the implicatio ...
  • Regional Rollout of the Super Air Meter SAM and Surface Resistivity SR for Performance Engineered Mixture Initiatives
    Regional Rollout of the Super Air Meter (SAM) and Surface Resistivity (SR) for Performance Engineered Mixture Initiatives
    Lacy, Tyler ;
    Mellons, Michael Jason
    2024-12-31 | PDF
    Performance Engineered Mixtures (PEMs) have been the primary focus of concrete mixture research on a national level for years. Tennessee has facilitated several projects over the years to move facets of PEM forward, including Enhancing Freeze-Thaw Resistance of Tennessee Concrete Mixes through Improved Air Void Testing (RES2020-09) and Determining ...
  • Hydrologic Approaches to Playa Lakes Areas of Significant Karst Geology and Arid Regions Project Summary Report
    Hydrologic Approaches to Playa Lakes, Areas of Significant Karst Geology, and Arid Regions [Project Summary Report]
    Ahmari, Habib ;
    Baharvand, Saman
    2024-12-31 | PDF
    The research team conducted a thorough literature review to provide an overview of the state of knowledge regarding hydrological practices in playa lakes, arid zones, and karst terrains. This involved reviewing a wide range of sources, including drainage design manuals from state departments of transportation, publications from the Federal Highway ...
  • Quantification of Field Performance and Nondestructive Testing of Timber Bridges in Colorado
    Quantification of Field Performance and Nondestructive Testing of Timber Bridges in Colorado
    Kim, Yail Jimmy
    2024-12-31 | PDF
    This report presents two major aspects related to evaluating timber bridges with nondestructive testing: i) laboratory experiments and ii) field applications. The first part of the report discusses the degradation processes and resulting outcomes of structural timber, Douglas Fir, that is broadly used for bridge construction. In accordance with the ...
  • A Statewide Geographic Information System GIS as a Predictive Tool for Locating Deeply Buried Archeological Deposits in Nebraska Phase IIIThe Sandhills Region
    A Statewide Geographic Information System (GIS) as a Predictive Tool for Locating Deeply Buried Archeological Deposits in Nebraska: Phase III-The Sandhills Region
    Layzell, Anthony L ;
    Mandel, Rolfe D.
    2024-12-23 | PDF
    This project developed a GIS to assist with the identification of deeply buried cultural deposits in alluvial settings across the Sandhills region of Nebraska. Soil survey data, previous geoarchaeological investigations, landform position, and other information was used to rank the potential of any stream valley setting as low, low-moderate, modera ...
  • Design Guidelines and Mitigation Strategies for Reducing Sedimentation of MultiBarrel Culverts
    Design Guidelines and Mitigation Strategies for Reducing Sedimentation of Multi-Barrel Culverts
    Muste, Marian
    ORCID ICON IMG
    2024-12-17 | PDF
    The accumulation of sediments at culverts is a chronic operational issue, frequently occurring at multi-barrel culverts located in erosion-prone watersheds. Sediment deposits can develop rapidly, impairing the culvert’s capacity to convey design flows and potentially leading to damage to both transportation infrastructure (e.g., road and culvert ov ...
  • Flood Assessment System for TxDOT
    Flood Assessment System for TxDOT
    Maidment, David ;
    Passalacqua, Paola
    2024-12-13 | PDF
    The National Weather Service (NWS) operates a National Water Model that continually forecasts water flow throughout the stream network of the United States, including 190,000 miles of streams divided into 100,000 stream reaches in Texas. The NWS has also deployed real-time flood inundation mapping to about half of Texas, and it will complete covera ...
  • Analyze Business Models for Implementation and Operation of a Statewide GNSS RTN [supporting dataset]
    Al-Kaisy, Ahmed ;
    Raza, Sajid
    2024-12-10 | md
    The Global Navigation Satellite System (GNSS), commonly known as the global positioning system, has become one of the fastest-growing emerging technologies delivering location services to various sectors. The applications of geospatial data span every sphere of modern-day science and industry where geographical positioning matters. The list include ...
    Dataset Supporting Files
  • Evaluate the Deployment of High Strength Reinforcing Steel in Texas
    Evaluate the Deployment of High Strength Reinforcing Steel in Texas
    Yu, Yongjae ;
    Espanol, Cheska
    2024-12-01 | PDF
    This research addresses the application of high-strength reinforcing steel in Texas bridge construction. The project involved experimental and analytical work to evaluate the effectiveness of current design recommendations for high-strength reinforcing steel in various bridge structural components. These components include spliced beam, CIP-PCP dec ...
  • Significant Factors of Bridge Deterioration Final Report
    Significant Factors of Bridge Deterioration: Final Report
    Fick, Damon ;
    Bell, Mathew
    2024-12-01 | PDF
    Bridges structures deteriorate over time due to various factors. Understanding the factors that affect bridge deterioration rates is necessary for state agencies to maintain the safety and functionality of bridges during their design service life. To improve deterioration modeling in Montana, significant factors affecting bridge deterioration were ...
  • Evaluation of Benefits of Drainable Base Systems Used by MnDOT
    Evaluation of Benefits of Drainable Base Systems Used by MnDOT
    Izevbekhai, Bernard Igbafen ;
    Aydin, Ceren
    2024-12-01 | PDF
    The Minnesota Department of Transportation (MnDOT) recognizes the importance of subsurface drainage in pavements. Various studies have indicated that adequate drainage of pavement layers enhances performance of pavements in general. MnDOT thus uses various types of subsurface drainage in varying degrees of styles, frequency of use, and minor variat ...
  • Cost Effective Alternatives for Mitigating Debris and Environmental Impacts Around Bridge Piers
    Cost Effective Alternatives for Mitigating Debris and Environmental Impacts Around Bridge Piers
    Witter, Jonathan D
    ORCID ICON IMG
    2024-12-01 | PDF
    This research study addressed three key problems: 1) identifying safer, timely, and cost-effective solutions for removing accumulated debris from bridge piers, 2) designing and implementing countermeasures to prevent debris accumulation, and 3) finding technological solutions to enhance bridge inspection, scour detection, and mapping of river cross ...
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