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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 1741 - 1760 of 35865 results
  • 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 ...
  • Evaluating Wildlife Use of the South Jackson Project Highway Crossing Structures Project Phase I
    Evaluating Wildlife Use of the South Jackson Project Highway Crossing Structures: Project Phase I
    Specht, Hannah ;
    Millspaugh, Joshua J
    2023-08-01 | PDF
    Roadways have the potential to negatively impact wildlife populations directly through vehicle collision mortality and indirectly through habitat fragmentation. The Wyoming Department of Transportation installed wildlife crossing structures and wildlife on US 89 between along a 3.6 mile stretch between Jackson and Hoback Junction to mitigate these ...
  • Synthesis Develop Guidance for Local Government Building Codes for Bridges
    Synthesis: Develop Guidance for Local Government Building Codes for Bridges
    Shahandashti, Mohsen ;
    Chao, Shih-Ho (Simon)
    2023-08-01 | PDF
    The design, construction, and maintenance of off-system bridges vary across local governments (cities and counties), often resulting in inferior performance compared to bridges managed by state highway agencies. Limited knowledge of local government practices hinders understanding of the factors contributing to these deficiencies and poses challeng ...
  • TRACtion Transformative Transportation Working Groups Synthesis
    TRACtion: Transformative Transportation Working Groups Synthesis
    University of California, Los Angeles. Institute of Transportation Studies
    2023-08-01 | PDF
    TRACtion: Transformative Research and Collaboration is a new approach to community–researcher collaboration that seeks to match the University’s academic expertise with the wisdom and perspectives of community groups and advocacy organizations. It is a partnership between the Sustainable LA Grand Challenge (SLAGC) and UCLA Institute of Transportati ...
  • Evaluation of the Asphalt Mixture Design Framework for Airfield Pavements in Illinois
    Evaluation of the Asphalt Mixture Design Framework for Airfield Pavements in Illinois
    Sulaiman, Abdulgafar O ;
    Ali, Uthman Mohamed
    2023-08-01 | PDF
    The Federal Aviation Administration (FAA) advisory circular AC 150/5100-13 authorized the use of state highway material specifications at nonprimary public-use airports serving aircraft less than 60,000 pounds gross weight. This approval is based on the condition that the safety and life span of these airports will not be adversely affected. The us ...
  • Design of Stormwater BMPs for Surface and Groundwater Protection Based on SiteScale Soil Properties Phase I
    Design of Stormwater BMPs for Surface and Groundwater Protection Based on Site-Scale Soil Properties: Phase I
    Kibler, Kelly M. ;
    Chambers, Lisa
    2023-08-01 | PDF
    Phase I of this research developed experimental methodologies to quantify and compare the rates and means of nitrogen and phosphorus transformations through diverse soil profiles. Six sites were selected for study from areas of distinct geologic history in Florida. Soils from the six sites were chosen to represent a gradient of clay and organic mat ...
  • Intelligent Transportation Systems Security Control Set Template and Instructions
    Intelligent Transportation Systems Security Control Set Template and Instructions
    Gabel, Randy ;
    Sames, Christina
    2023-07-31 | PDF
    This document is a template and instructions for developing control sets for ITS physical objects (systems and devices) as defined in Architecture Reference for Cooperative and Intelligent Transportation (ARC-IT). The control sets can be provided to developers and can be used to identify requirements for developing and assessing physical objects. T ...
  • Working With Autonomous Trucks To Improve Routine Maintenance Operations Research Brief
    Working With Autonomous Trucks To Improve Routine Maintenance Operations [Research Brief]
    Chin, Kristie ;
    Gold, Andrea
    2023-07-31 | PDF
    The aim of Project 0-7129 was to demonstrate that AV trucking data can be effectively ingested and reported to TxDOT maintenance personnel, improving operational efficiency. Texas leads the nation in AV testing and deployment, with significant stakeholder support for the IRMF’s potential to reduce reporting latency and improve geographical and seve ...
  • Investigate Potential Connected and Automated Vehicle CAV Liability Issues Within TxDOT Project Summary
    Investigate Potential Connected and Automated Vehicle (CAV) Liability Issues Within TxDOT [Project Summary]
    Stoeltje, Gretchen ;
    Hwang, Billy
    2023-07-31 | PDF
    This project is one of the first CAV research projects focused on liability issues from a state department of transportation perspective. The research team was a collaboration between the Texas A&M Transportation Institute and Stantec. Six research tasks were conducted to identify potential tort liability from the deployment of CAV technologies. A ...
  • Development of a Fatigue Testing Protocol for Supporting Integrated Design of Asphalt Pavement
    Development of a Fatigue Testing Protocol for Supporting Integrated Design of Asphalt Pavement
    Solaimanian, Mansour ;
    Sahraei, Ali
    2023-07-28 | PDF
    This research study was sponsored by PennDOT and US DOT Transportation Research Center to evaluate the potential of the Hamburg wheel tracking device (HWTD) in determining the mix quality in terms of fatigue cracking resistance. The research work included applying changes to HWTD, developing the test setup and the experimental plan, conducting the ...
  • Crashworthy Perforated Square Steel Tube PSST Mailbox Support Phase I
    Crashworthy Perforated Square Steel Tube (PSST) Mailbox Support – Phase I
    Bielenberg, R.W. ;
    Stolle, C.S.
    2023-07-07 | PDF
    Federal requirements have made it mandatory that safe mailbox support systems be designed to yield or breakaway when impacted by a vehicle. The Nebraska Department of Transportation (NDOT) has previously used a non-proprietary, U-channel post mailbox support that was evaluated at the Midwest Roadside Safety Facility (MwRSF) in the 1980's. NDOT desi ...
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    NY Statewide Behavioral Equity Impact Decision Support Tool with Replica [supporting datasets]
    Chow, Joseph Y J ;
    Ren, Xiyuan
    2023-07-04 | ZIP
    A NY statewide model choice model is developed to deterministically fit heterogeneous coefficients for trips along each census block-group OD pair conducted by each population segment within a random-utility-consistent framework. The proposed approach is to use inverse optimization (IO) to derive coefficients for each OD pair times population segme ...
  • Economical Impact of Full Closure for Accelerated Bridge Construction and Conventional Staged Construction
    Economical Impact of Full Closure for Accelerated Bridge Construction and Conventional Staged Construction
    El-Rayes, Khaled ;
    El-Gohary, Nora
    2023-07-01 | PDF
    Accelerated bridge construction (ABC) methods have been increasingly used in recent years to reduce the impact of construction operations on traffic and mobility. ABC methods, however, often require a higher initial cost, more planning, and additional design coordination. Several tools have been developed to assist decision-makers in the selection ...
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