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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 1381 - 1400 of 35448 results
  • Utilization of UHPC Bridge Superstructures in Texas Volume 2 Structural Analysis Design and FullScale Testing of Precast Pretensioned Girders
    Utilization of UHPC Bridge Superstructures in Texas— Volume 2: Structural Analysis, Design, and Full-Scale Testing of Precast, Pretensioned Girders
    Hueste, Mary Beth D. ;
    Mander, John
    2023-10-01 | PDF
    The use of ultra-high performance concrete (UHPC) in Texas bridges has potential to produce substantial improvements to bridge construction. Advanced material properties and superior durability of UHPC can result in significant design and construction benefits. An analytical feasibility study showed that UHPC bridge girders provide increased design ...
  • Utilization of UHPC Bridge Superstructures in Texas Volume 3 UHPC Production Guidelines and Design Recommendations with Design Examples
    Utilization of UHPC Bridge Superstructures in Texas— Volume 3: UHPC Production Guidelines and Design Recommendations with Design Examples
    Hueste, Mary Beth D. ;
    Mukhopadhyay, Anol
    2023-10-01 | PDF
    The use of ultra-high performance concrete (UHPC) in Texas bridges has the potential to add substantial improvements to bridge construction. Advanced material properties and superior durability of UHPC can result in significant design and construction benefits. Within this context, this project evaluated the application of UHPC for precast, pretens ...
  • District Highway Maintenance Research OnCall ROC Task 4 Best Practices for Using Slag in Chip Seal Treatments
    District Highway Maintenance Research On-Call (ROC) Task 4: Best Practices for Using Slag in Chip Seal Treatments
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-10-01 | PDF
    This research-on-call (ROC) task was conducted to assist the Ohio Department of Transportation (ODOT) in gaining a better understanding of slag materials that can be used as chip seal aggregates and the potential benefits and drawbacks from using these materials with chip seal treatments. An online survey was conducted in this study to gather infor ...
  • District Highway Maintenance Research OnCall Task4 Best Practices for Using Slag in Chip Seal Treatments Fact Sheet
    District Highway Maintenance Research On-Call Task#4 - Best Practices for Using Slag in Chip Seal Treatments [Fact Sheet]
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-10-01 | PDF
    In 2018, the Ohio Department of Transportation (ODOT) District 1 conducted a trial chip seal project in Defiance County on State Route 66 that utilized electric arc furnace (EAF) slag in lieu of the traditional limestone aggregates. The results of this chip seal project have been mixed thus far. There was an increase in the number of windshield bre ...
  • Reevaluating City Speed Limits with Public Safety in Mind Implementation Summary
    Reevaluating City Speed Limits with Public Safety in Mind [Implementation Summary]
    Arvidson, Tim ;
    Manchester, Will
    2023-10-01 | PDF
    A recent legislative change has given Minnesota cities greater authority in establishing lower speed limits on streets in their jurisdiction—a decision that could potentially have positive impacts on public safety, especially pedestrian and bicycle traffic. A recent analysis of speed-setting practices and the effectiveness of speed limit changes re ...
  • Effectively Implementing Machine Learning with Office of Materials Technology Research Summary
    Effectively Implementing Machine Learning with Office of Materials Technology [Research Summary]
    Zhang, Yunfeng
    2023-10-01 | PDF
    Machine learning models provide significant value for planning and asset management purposes by maximizing the usefulness of past data collection for decision-making and policy development. Newer and more powerful machine learning models not available in previous applications and research in highway transportation fields are investigated to address ...
  • Effectively Implementing Machine Learning with Office of Materials Technology
    Effectively Implementing Machine Learning with Office of Materials Technology
    Zhang, Yunfeng ;
    Xu, Jianshu
    2023-10-01 | PDF
    Machine learning models provide significant value for planning and asset management purposes by maximizing the usefulness of past data collection for decision-making and policy development. Newer and more powerful machine learning models not available in previous applications and research in highway transportation fields are investigated to address ...
  • Connected Autonomous Shuttle Supporting Innovation CASSI in Carys Bond Park
    Connected Autonomous Shuttle Supporting Innovation (CASSI) in Cary’s Bond Park
    Searcy, Sarah ;
    Curran, Shelley
    2023-10-01 | PDF
    The North Carolina Department of Transportation (NCDOT) partnered with Cary, NC (Cary) and Beep, Inc. (Beep) to bring a novel-design, all-electric, low-speed automated shuttle to Fred G. Bond Metro Park (Bond Park) in Cary for a 13-week pilot through the Connected Autonomous Shuttle Supporting Innovation (CASSI) program. Beep operated a Navya Auton ...
  • Evaluating and Validating Technology Options for Estimating Transit Vehicle Occupancy in Real Time
    Evaluating and Validating Technology Options for Estimating Transit Vehicle Occupancy in Real Time
    Sun, Yanshuo ;
    Guo, Qianwen
    2023-10-01 | PDF
    The primary goal of this project was to evaluate and validate various technologies for collecting transit vehicle occupancy information in real time. The specific objectives include the following: (1) Identify a list of potential technology alternatives for transit vehicle occupancy estimation by scanning the academic literature, news, and technica ...
  • Identification of Likely Alternative Supplementary Cementitious Materials in California A Review of Supplies Technical Performance in Concrete Economic and Climatic Considerations
    Identification of Likely Alternative Supplementary Cementitious Materials in California: A Review of Supplies, Technical Performance in Concrete, Economic, and Climatic Considerations
    Nassiri, Somayeh ;
    Butt, Ali A
    2023-10-01 | PDF
    This report is a comprehensive review of natural and human-made materials with the potential to reduce cement content in concrete by partially replacing Portland cement or as additives. The review aims to reveal possible source materials as alternative supplementary cementitious materials (ASCMs) to coal-burned fly ash and ground granulated blast f ...
  • Field Evaluation of Wireless Ultrasonic Thickness Measurement with Steel Bridge Members
    Field Evaluation of Wireless Ultrasonic Thickness Measurement with Steel Bridge Members
    Wang, Yang ;
    Otsuki, Yu
    2023-10-01 | PDF
    This report presents the field validation of wireless ultrasonic thickness measurement systems on in-service steel bridges. The objective of this implementation is to demonstrate the feasibility of long-term corrosion monitoring. The developed system utilizes Martlet wireless ultrasonic sensing devices with two specially designed daughterboards: th ...
  • Forecasting TSPLOST Revenues in Georgia
    Forecasting TSPLOST Revenues in Georgia
    Bluestone, Peter ;
    Jimenez, Benedict
    2023-10-01 | PDF
    Due to the long-term planning involved in the design and construction of transportation infrastructure projects, transportation planners need reliable long-run forecasts and stable sources of revenue over the project timeline. Funding streams typically vary from period to period due to inherent volatility in the funding source or unforeseen events, ...
  • Evaluation of LargeFormat Metallic Additive Manufacturing AM for Steel Bridge Applications Final Report of Tensile Impact and Fatigue Testing Results
    Evaluation of Large-Format Metallic Additive Manufacturing (AM) for Steel Bridge Applications: Final Report of Tensile, Impact, and Fatigue Testing Results
    Sherman, Ryan J. ;
    Kessler, Hannah D
    2023-10-01 | PDF
    Wire arc additive manufacturing (WAAM) is an additive manufacturing process capable of printing using metallic feedstocks, such as traditional welding wire consumables. Advances in WAAM allow large-scale components, measured on the scale of feet, to be fabricated. A lack of fundamental knowledge of the material and fatigue behaviors of WAAM current ...
  • A Feasibility Study for Establishing A Regional Road Track Pavement Testing Facility in Wyoming Data Management Plan
    A Feasibility Study for Establishing A Regional Road Track Pavement Testing Facility in Wyoming [Data Management Plan]
    Hafez, Marwan ;
    Ksaibati, Khaled
    2023-10-01 | PDF
    The purpose of this research project is to: evaluate the feasibility of constructing a state-of-the-art pavement testing facility on I-80 in Wyoming to conduct pavement research studies for the dry freeze climatic region.
  • Evaluation of Roadway HighMast Tower Lighting
    Evaluation of Roadway High-Mast Tower Lighting
    Gibbons, Ronald B ;
    Bhagavathula, Rajaram
    2023-10-01 | PDF
    This study conducted an evaluation of high-mast roadway lighting, which included a review of Illinois Department of Transportation’s high-mast lighting specification and a field experiment. The lighting specification was reviewed for potential cost-saving measures. Recommended changes included the use of an external drive mechanism, a design-by-app ...
  • Research and Findings on Roundabouts and Innovative Intersections for HighSpeed and Rural Locations
    Research and Findings on Roundabouts and Innovative Intersections for High-Speed and Rural Locations
    Brewer, Marcus A. ;
    Fitzpatrick, Kay
    2023-10-01 | PDF
    Texas has thousands of centerline-miles of high-speed roadways where access might traditionally have been restricted, but there are an increasing number of high-speed roadways that have at-grade intersections and driveways. Innovative intersection designs (e.g., j-turns, median U-turns) and modern roundabouts have been used to remove conflict point ...
    Supporting Files
  • Durability of Concrete Using Low Slag Cement Contents
    Durability of Concrete Using Low Slag Cement Contents
    Riding, Kyle A ;
    Ferraro, Christopher C.
    2023-10-01 | PDF
    Supplemental cementitious materials (SCMs), such as fly ash, slag, silica fume, and metakaolin have become commonplace in Florida concrete, particularly for high durability or high-strength concrete. The Florida Department of Transportation (FDOT) currently allows fly ash to be used as a cement replacement at 18-50% levels and slag cement to be sub ...
  • Drying Shrinkage Response of FullScale Thin Concrete Overlay on Asphalt Sections
    Drying Shrinkage Response of Full-Scale Thin Concrete Overlay on Asphalt Sections
    Mateos, Angel ;
    Harvey, John
    2023-10-01 | PDF
    Moisture-related shrinkage is regarded as one of the phenomena that has the largest impacts on the performance of jointed plain concrete pavements. Still, most mechanistic-empirical design methods oversimplify or ignore predictions of moisture-related shrinkage and its effects on concrete pavements. This study evaluates how moisture-related shrinka ...
  • Impact of IncentiveDisincentive Specifications on LongTerm Asphalt Pavement Performance Summary
    Impact of Incentive/Disincentive Specifications on Long-Term Asphalt Pavement Performance [Summary]
    Lee, Hyung S ;
    Choubane, Bouzid
    2023-10-01 | PDF
    FDOT’s Percent Within Limits (PWL) specification for acceptance and payment of asphalt materials was first implemented in 2002. The objective of this study was to determine the level of impact that FDOT’s PWL specification has on the long-term performance of asphalt pavements. To meet this objective, Multinomial Logistic Regression Analyses (MLRA) ...
  • Utilizing Reclaimed Asphalt Pavement in Preservation Treatments
    Utilizing Reclaimed Asphalt Pavement in Preservation Treatments
    Sayeh, Watheq ;
    Al-Qadi, Imad L
    2023-10-01 | PDF
    The use of reclaimed asphalt pavement (RAP) has economic and environmental impacts. This report investigates the prospective use of RAP in preservation treatments (mainly chip sealing and microsurfacing) in Illinois. A review of the current state of knowledge and practice was conducted. The economic and logistic feasibility of using RAP in preserva ...
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