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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 461 - 480 of 35440 results
  • An Integrated Online Application for SiteManager and Pavement Analyst
    An Integrated Online Application for SiteManager and Pavement Analyst
    Rahman, Syeda ;
    Bhasin, Amit
    2025-01-01 | PDF
    The objectives of this study were to integrate material, construction, maintenance, and performance information, and to deploy the unified data on a commercial system licensed by TxDOT so that Division and District personnel can access and interact with these data. Data from the SMGR, PA, and DCIS databases were identified, integrated, and processe ...
  • Updating Rainfall Zones and Intensities in Nebraska for Improved Design of Nonbridgesized Drainage Structures
    Updating Rainfall Zones and Intensities in Nebraska for Improved Design of Non-bridge-sized Drainage Structures
    Mahmood, Rezaul ;
    Roy, Tirthankar
    2025-01-01 | PDF
    This study assesses the effectiveness of precipitation zones and Intensity-Duration-Frequency (IDF) curves used by the Nebraska Department of Transportation (NDOT) for designing drainage structures. Twenty stations were selected for the analysis of revised IDF curves out of forty-two stations. Datasets have been considered from the National Center ...
  • Performance Evaluation of Safe Mobility for Life Coalitions Outreach Activities to Benefit Aging Road Users
    Performance Evaluation of Safe Mobility for Life Coalition’s Outreach Activities to Benefit Aging Road Users
    Alluri, Priyanka ;
    Mdimi, Odilo
    2025-01-01 | PDF
    As Florida’s aging population increases, the demand to ensure safe mobility for older adults also increases, especially since aging road users are vulnerable to serious and fatal crashes. Over 20% of Florida residents are aged 65 or older, and this number is projected to increase by 2045. Age is linked with a decline in vision, cognition, and react ...
  • A Systematic Evaluation of Generative Models on Tabular Transportation Data
    A Systematic Evaluation of Generative Models on Tabular Transportation Data
    Wang, Chengen ;
    Cardenas, Alvaro A.
    2025-01-01 | PDF
    The sharing of large-scale transportation data is beneficial for transportation planning and policymaking; however, there are privacy concerns with data sharing, as it can include identifiable personal information, such as individuals’ home locations. To address these concerns, synthetic data generation based on real transportation data offers a pr ...
  • Moving Forward Ohio Department of Transportation Research Program Newsletter Fall 2025 Volume 2
    Moving Forward: Ohio Department of Transportation Research Program Newsletter: Fall 2025 Volume 2
    Ohio’s Research Initiative for Locals
    2025-01-01 | PDF
    ODOT’s Research Newsletter is designed to provide practice-ready solutions to real-world issues facing Ohio’s local transportation system through research. It’s a multi-organizational collaborative effort to improve the transportation network in Ohio’s counties, townships, cities and villages.
  • Control Guidelines for Aggregate Drainage Layers and Evaluation of InSitu Permeability Testing Methods for Aggregates Brief
    Control Guidelines for Aggregate Drainage Layers and Evaluation of In-Situ Permeability Testing Methods for Aggregates [Brief]
    Santagata, Maria C. ;
    Becker, Peter J.
    2025-01-01 | PDF
    This project examined the use of the light weight deflectometer (LWD) and the air permeameter test (APT) for control of the state of compaction and hydraulic conductivity of aggregate drainage layers. The investigation included an extensive program of LWDs, APTs, and nuclear density tests on two testing strips constructed at an experimental site—on ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • 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) ...
  • 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 | ZIP
    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
  • Use of Dashboards for Winter Operations
    Use of Dashboards for Winter Operations
    Crow, Mallory ;
    Lee, Ming-Shiun
    2024-12-01 | PDF
    Public works agencies at state and municipal levels have invested a large amount of personnel and funding resources in dashboards to improve winter maintenance operations. The types and amounts of data gathered and performance measures used to track and monitor winter maintenance operations vary by agency. Due to these differences, there is a need ...
  • Salt Shed Design Template
    Salt Shed Design Template
    Nixon, Wilfrid A. ;
    Williams, Clay
    2024-12-01 | PDF
    This project was undertaken to develop tools and guidelines for designing efficient, sustainable, and environmentally compliant salt storage facilities for winter maintenance operations. The project addressed critical issues such as environmental impacts of chloride runoff, optimization of facility design and location, and the development of tools ...
  • Traffic Safety Facts 2022 A Compilation of Motor Vehicle Traffic Crash Data
    Traffic Safety Facts 2022: A Compilation of Motor Vehicle Traffic Crash Data
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-12-01 | National Transportation Statistics (NTS) | PDF
    Fact sheets available from NCSA are Alcohol-Impaired Driving, Bicyclists and Other Cyclists, Children, Large Trucks, Motorcycles, Occupant Protection in Passenger Vehicles, Older Population, Passenger Vehicles, Pedestrians, Race and Ethnicity, Rural/Urban Traffic Fatalities, School-Transportation-Related Traffic Crashes, Speeding, State Alcohol-Imp ...
  • Traffic Safety Facts Overview of the 2023 Crash Investigation Sampling System
    Traffic Safety Facts: Overview of the 2023 Crash Investigation Sampling System
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2024-12-01 | National Transportation Statistics (NTS) | PDF
    Data from the 2023 Crash Investigation Sampling System (CISS) shows there were an estimated 2,555,023 police-reported motor vehicle traffic crashes nationwide where at least one passenger vehicle (i.e., passenger car, light truck, or van less than 10,000 lb) was towed from the crash scene, which resulted in an estimated 1,043,485 injured occupants ...
  • Traffic Safety Facts Early Estimate of Motor Vehicle Traffic Fatalities for the First 9 Months JanuarySeptember of 2024
    Traffic Safety Facts: Early Estimate of Motor Vehicle Traffic Fatalities for the First 9 Months (January–September) of 2024
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2024-12-01 | National Transportation Statistics (NTS) | PDF
    A statistical projection of traffic fatalities for the first 9 months of 2024 shows an estimated 29,135 people died in motor vehicle traffic crashes, a decrease of about 4.4 percent compared to 30,490 fatalities projected for the first 9 months of 2023. he third quarter of 2024 represents the 10th consecutive quarterly decline in fatalities beginni ...
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