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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 1561 - 1580 of 35452 results
  • Rural Intersections within Passing Lanes
    Rural Intersections within Passing Lanes
    Fitzpatrick, Kay ;
    Brewer, Marcus A.
    2023-08-01 | PDF
    Super 2 highways are used across Texas to provide passing opportunities and increase capacity on rural two-lane roads, but passing lanes are a treatment for through vehicles and do not address the needs of turning vehicles. This project investigated the operational and safety benefits of turning treatments on two-lane and Super 2 corridors, as well ...
  • Development of Potential Strategies for Unmarked and Low Traffic Volume Roadways in Illinois
    Development of Potential Strategies for Unmarked and Low Traffic Volume Roadways in Illinois
    Rajagopal, Arudi (Raj) ;
    Mercurio, John
    2023-08-01 | PDF
    The present study was initiated by the Illinois Department of Transportation (IDOT) to better understand characteristics of roadway segments categorized as unmarked in IDOT’s Transportation Asset Management Plan and to suggest recommendations to manage, vacate, abandon, retain, or transfer individual routes. The researchers developed a methodology, ...
  • Improved California Truck Traffic Census Reporting and Spatial Activity Measurement
    Improved California Truck Traffic Census Reporting and Spatial Activity Measurement
    Ritchie, Stephen G. ;
    Tok, Andre
    2023-08-01 | PDF
    The Federal Highway Administration (FHWA) vehicle classification scheme is designed to serve various transportation operational and planning needs. Many transportation agencies rely on Weigh-In-Motion and automatic vehicle classification sites to collect vehicle classification count data. However, these systems are not widely deployed due to high i ...
  • Strategies to Preserve Transitaccessible Affordable Housing in Southern California
    Strategies to Preserve Transit-accessible Affordable Housing in Southern California
    Parker, Madeleine E.G ;
    Chapple, Karen
    2023-08-01 | PDF
    This report highlights risk and prioritization factors for housing developments with expiring affordability protections, focused on preserving transit-accessible affordable housing. It presents a regional framework for identifying and preserving subsidized affordable housing in the Southern California Association of Governments (SCAG) region (Los A ...
  • Effectiveness of Highway Safety Public Education at Montana Motor Vehicle Registration Stations by Streaming a Variety of Safety Content
    Effectiveness of Highway Safety Public Education at Montana Motor Vehicle Registration Stations by Streaming a Variety of Safety Content
    Villwock-Witte, Natalie ;
    Clouser, Karalyn
    2023-08-01 | PDF
    State departments of transportation, including the Montana Department of Transportation (MDT) focus on eliminating fatalities and serious injuries on our roadways. To accomplish this, MDT employed several strategies including an emphasis on improving traffic safety culture. Traffic safety culture strategies, including public awareness campaigns and ...
  • Traffic Control Device Analysis Testing and Evaluation Program FY2022 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2022 Activities
    Finley, Melisa D. ;
    Venglar, Steven P.
    2023-08-01 | PDF
    Traffic control devices are a primary means of communicating highway information to road users. The design, application, and maintenance of traffic control devices are under constant transformation as new technologies, methodologies, and policies are introduced. This project provides the Texas Department of Transportation with a mechanism to conduc ...
  • Traffic Control Device Analysis Testing and Evaluation Program FY2021 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2021 Activities
    Finley, Melisa D. ;
    Theiss, LuAnn
    2023-08-01 | PDF
    Traffic control devices are a primary means of communicating highway information to road users. The design, application, and maintenance of traffic control devices are under constant transformation as new technologies, methodologies, and policies are introduced. This project provides the Texas Department of Transportation with a mechanism to conduc ...
  • Smart Connected and Automated Vehicle Fleet Management Developing Regional Dispatch Decision Support for Congestion Mitigation
    Smart Connected and Automated Vehicle Fleet Management: Developing Regional Dispatch Decision Support for Congestion Mitigation
    Cummings, M ;
    Rouphail, Nagui M.
    2023-08-01 | PDF
    With the arrival of new technologies like connected and self-driving autonomous vehicles (AVs), the workload of regional dispatchers will increase. To this end, the CADS (Congestion Alerting Decision Support) tool was developed to support strategic transportation planning (on the order of weeks to months) and tactical transportation planning (on th ...
  • District Highway Maintenance ResearchOnCall Task 8 Improving the Process of Removing Totem Poles
    District Highway Maintenance Research-On-Call Task 8: Improving the Process of Removing Totem Poles
    Witter, Jonathan D ;
    Nazzal, Munir
    2023-08-01 | PDF
    Roadside vegetation management can be a time-consuming and potentially dangerous task, particularly on steep embankments typical of unglaciated regions in Ohio. Furthermore, tree clearing is usually undertaken during difficult weather conditions (i.e., snowy, icy) as regulations for agencies that receive federal funding limit clearing to protect ha ...
  • Impacts of Hydraulic Modeling Methods on Bridge Scour Analysis
    Impacts of Hydraulic Modeling Methods on Bridge Scour Analysis
    Cox, Amanda L. ;
    Luna, Ronaldo
    2023-08-01 | PDF
    This study has three primary purposes: 1) to investigate the impacts of hydraulic modeling methods on bridge scour analysis, 2) to develop recommendations for sediment/soil sampling methods, and 3) to conduct bridge scour risk assessments. Field data were collected at five study sites to obtain the required terrain and soil/sediment input data for ...
    Supporting Files
  • Pile Setup and Restrike Procedures
    Pile Setup and Restrike Procedures
    Rosenblad, Brent L. ;
    Boeckmann, Andrew Z.
    2023-08-01 | PDF
    The primary objective of this research is to provide MoDOT with rational procedures and guidelines to incorporate pile setup in MoDOT pile design. Pile setup refers to the time-dependent increase in the capacity of driven piles that occurs after the end of piledriving. High-strain dynamic load test data from end of driving (EOD) and beginning of re ...
  • Economic Effect of Active Transportation Features and the Association Between the Healthcare Industry and Transportation
    Economic Effect of Active Transportation Features and the Association Between the Healthcare Industry and Transportation
    Dunlop, Steven R ;
    Ukkusuri, Satish
    2023-08-01 | PDF
    The goal of this project is to help INDOT determine the economic effects of active transportation features, the impact of transportation infrastructure on the healthcare industry, and to explore a potential relationship between active transportation and healthcare. To capture the details thoroughly, the analysis was done at a macro and micro level. ...
  • Advanced Subsurface Investigations Beyond the Borehole with Passive Seismic HorizontaltoVertical Spectral Ratio and Electromagnetic Geophysical Methods at Transportation Infrastructure Sites in New Hampshire
    Advanced Subsurface Investigations Beyond the Borehole with Passive Seismic Horizontal-to-Vertical Spectral Ratio and Electromagnetic Geophysical Methods at Transportation Infrastructure Sites in New Hampshire
    Degnan, James R ;
    Welch, Sydney
    2023-08-01 | PDF
    Geotechnical site characterization sometimes fails to fully characterize the below-ground bedrock surface and hydrologic conditions using conventional borings. By combining geophysical and boring data analysis, transportation projects can produce a more thorough and accurate representation of geotechnical subsurface conditions, reducing the disrupt ...
  • Effect of AggregateBinder Compatibility on Performance of Asphalt Mixtures in Arkansas
    Effect of Aggregate-Binder Compatibility on Performance of Asphalt Mixtures in Arkansas
    Hossain, Zahid ;
    Braham, Andrew
    2023-08-01 | PDF
    The main objectives of this study were to assess compatibility among different types of binders and aggregates and to determine the maximum amount of sandstone aggregates in asphalt concrete surface mix (ACHM). To this end, three Performance Grade (PG) binders (PG 64-22, PG 70-22, and PG 76-22), each from six different sources were evaluated in the ...
  • Modifying Existing Asphalt Mix Design Procedures for RAPRAS Surface Mixtures
    Modifying Existing Asphalt Mix Design Procedures for RAP/RAS Surface Mixtures
    Castorena, Cassie ;
    Underwood, Benjamin Shane
    2023-08-01 | PDF
    The NCDOT mixture design procedure assumes 100 percent of the binder contained within reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) is available for blending with virgin asphalt. However, the literature shows that this assumption is flawed due to the presence of recycled asphalt material (RAM) agglomerations that prevent comp ...
  • CrowdsourcingWinter Operations Dashboard Upgrade
    Crowdsourcing/Winter Operations Dashboard Upgrade
    Mahlberg, Justin ;
    Desai, Jairaj
    2023-08-01 | PDF
    INDOT has recently completed the deployment of Parsons telematics-based dash-cameras, automatic vehicle locator (AVL) positions, and spreader rate monitoring across their winter operations fleet. The motivation of this study was to develop dashboards that integrate connected vehicle data into the real-time monitoring and after-action review of wint ...
  • Implementation of Electrical Resistivity Imaging Manual
    Implementation of Electrical Resistivity Imaging Manual
    Shahandashti, Mohsen ;
    Hossain, Sahadat
    2023-08-01 | PDF
    Texas Department of Transportation (TxDOT) annually encounters a substantial number of claims and change orders that have a detrimental effect on project costs and schedules. State Departments of Transportation (DOTs) spend approximately $10 million annually on geotechnical-related change orders, accounting for about 7% of the total expenditures as ...
  • Ohios Research Initiative for Locals ORIL Research OnCall Synthesis of OrdinancesPractices on Micromobility Systems Within Ohio 2021ORIL6 Task 8
    Ohio’s Research Initiative for Locals (ORIL) Research On-Call – Synthesis of Ordinances/Practices on Micromobility Systems Within Ohio [2021-ORIL6 Task #8]
    Naik, Bhaven ;
    Thomas, John
    2023-08-01 | PDF
    Ohio’s transportation system has witnessed the inclusion of a new mode of travel – shared micromobility (i.e., scooters, e-bikes, and other methods). Shared-micromobility is beneficial, in that, it connects with the larger transportation system and increases the value of other available transportation options. Initially, there were mixed views on t ...
  • Assessing Ohios Detour Determination Reporting for Process Improvements ORIL ROC 2021ORIL6 Task 5
    Assessing Ohio’s Detour Determination Reporting for Process Improvements [ORIL ROC 2021-ORIL6 Task #5]
    Naik, Bhaven ;
    Eustace, Deogratias
    2023-08-01 | PDF
    Ohio’s local public agencies (County Engineers, Township Trustees, Villages and Municipalities) often experience the burden of construction traffic when the Ohio DOT (ODOT) closes a state route for construction. ODOT typically provides the locals with a Detour Determination Report (DDR) that evaluates the length of a detour, duration of closure and ...
  • Developing a Prototype System for Establishing Passing and NoPassing Zones of TwoLane Highways
    Developing a Prototype System for Establishing Passing and No-Passing Zones of Two-Lane Highways
    Farid, Ahmed ;
    Connell, Zephaniah
    2023-08-01 | PDF
    Two-lane highways comprise a considerable percentage of the nation’s roads. A critical component required in the design of two-lane highways is the passing sight distance (PSD). In cases where it is inadequate, no-passing zones are established. There are multiple techniques that are employed for measuring the PSD in the field and the Wyoming Depart ...
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