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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 921 - 940 of 35815 results
  • Enhanced Capabilities of the Illinois Accelerated Pavement Tester
    Enhanced Capabilities of the Illinois Accelerated Pavement Tester
    Renshaw, Greg ;
    Al-Qadi, Imad L.
    2024-08-01 | PDF
    After being in service for nearly 20 years, the Illinois Accelerated Pavement Tester (I-APT) was upgraded to provide enhanced capabilities for accelerated pavement testing. In addition to a new control system, the improvement included a newly designed load carriage, which allows for testing with a tandem half-axle, axle yaw, and shear loading (brea ...
  • Inventorying Documenting and Configuring Traffic Management System Assets and Resources Current Practices
    Inventorying, Documenting, and Configuring Traffic Management System Assets and Resources — Current Practices
    Lukasic, Daniel ;
    Belella, Paul
    2024-08-01 | PDF
    This report explores the benefits of developing, using, and maintaining an inventory of traffic management system (TMS) assets and resources for State and local agencies. By documenting, inventorying, and configuring assets and resources, agencies can enhance the day-to-day management and operation of TMSs. Agencies may also benefit from incorporat ...
  • Design and Rehabilitation Strategies for Permeable Friction Course Pavements
    Design and Rehabilitation Strategies for Permeable Friction Course Pavements
    Arámbula-Mercado, Edith ;
    Estakhri, Cindy
    2024-08-01 | PDF
    Thousands of miles of permeable friction course (PFC) pavements have performed well for the last 10 to 15 years on Texas highways. PFC pavement reduces hydroplaning, splash and spray, and pavement noise and improves ride quality and safety in wet weather. Hundreds of miles of PFC pavements are now at the end of their service life and need to be reh ...
  • Improving Smart Work Zone Deployments in Texas
    Improving Smart Work Zone Deployments in Texas
    Ullman, Gerald ;
    Miller, Matt
    2024-08-01 | PDF
    Smart work zones utilize technologies and strategies to enhance transportation safety, mobility, traveler satisfaction, and even construction/maintenance productivity through and around work zones. To date, there have been both positive and negative experiences with the technology. The objectives of this study were to determine why some smart work ...
  • Influencing Travel Behavior via an OpenSource Platform Phase 2 Brief
    Influencing Travel Behavior via an Open-Source Platform Phase 2 [Brief]
    Valdes, Didier M. ;
    Figueroa-Medina, Alberto M
    2024-08-01 | PDF
    This project uses the open-source platform OneBusAway (OBA) developed at USF to explore strategies that can influence travel behavior to increase transit ridership. OneBusAway currently provides real-time transit information to users on a full range of devices and communication platforms, such as mobile apps, and serves more than 400,000 individual ...
  • ODOTs Snow and Ice Performance Evaluation Tools A Student Transportation Advancement Research STAR Project
    ODOT‘s Snow and Ice Performance Evaluation Tools - A Student Transportation Advancement Research (STAR) Project
    Masanja, Ntemi Methusela ;
    Mihayo, Meshack P
    2024-08-01 | PDF
    Severe winter weather poses a significant threat to road users, primarily due to slippery road surfaces, which considerably increase the risk of crashes and injuries. Additionally, such conditions can disrupt traffic flow on highways, causing speed reductions, decreased highway capacity, or even complete traffic lockdowns. Most Departments of Trans ...
  • ODOTs Snow and Ice Performance Evaluation Tools A Student Transportation Advancement Research STAR Project Fact Sheet
    ODOT‘s Snow and Ice Performance Evaluation Tools - A Student Transportation Advancement Research (STAR) Project [Fact Sheet]
    Masanja, Ntemi Methusela ;
    Mihayo, Meshack P
    2024-08-01 | PDF
    Severe winter weather poses a significant threat to road users, primarily due to slippery road surfaces, which considerably increase the risk of crashes and injuries. Additionally, such conditions can disrupt traffic flow on highways, causing speed reductions, decreased highway capacity, or even complete traffic lockdowns. Most Departments of Trans ...
  • Evaluation of Manual Thermal Brake Screening Systems
    Evaluation of Manual Thermal Brake Screening Systems
    Koo, Jeeyen ;
    Leddy, David
    2024-08-01 | PDF
    In 2021, manual thermal brake screening systems were installed at Lyon EB and Rowan County weigh stations. Two additional units were installed at Laurel SB and Scott County weigh stations the following year. Although this system is called a thermal brake screening system, its thermal camera images are used to find both brake and tire-related violat ...
  • Developing Data Sources and Standards for Supporting Arterial TSMO Implementation of the Statewide Arterial Management Program STAMP
    Developing Data Sources and Standards for Supporting Arterial TSM&O Implementation of the Statewide Arterial Management Program (STAMP)
    Abdel-Aty, Mohamed ;
    Barbour, Natalia
    2024-08-01 | PDF
    The current research project aimed to evaluate the necessary elements for creating a data management platform for the FDOT districts. To achieve the project objectives, a statewide survey was developed and disseminated to each district in Florida and the findings were used to summarize best practices and areas of opportunity. The literature review ...
  • Strategies to Address HeadOn Crashes
    Strategies to Address Head-On Crashes
    Alluri, Priyanka ;
    Gattupal, Harsha
    2024-08-01 | PDF
    While head-on crashes generally constitute a small proportion of total crash occurrences, they often result in fatal and incapacitating injuries. As a result, many agencies are exploring strategies to mitigate head-on crashes and resulting injuries. This research examined head-on crashes that occurred in Florida Department of Transportation (FDOT) ...
  • Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset]
    Abdallah, Imad ;
    Montoya, Miguel A.
    2024-08-01 | XLSX
    The raw data includes one excel file (418 KB) covering measurements including time, temperature, frequency, phase angle, complex modulus, elastic modulus, viscous modulus, complex viscosity, shear stress, and strain.
    Dataset Supporting Files
  • Laboratory Information Materials Management System LIMMS Development Planning
    Laboratory Information Materials Management System (LIMMS) Development Planning
    Tessier, Russell
    2024-07-31 | PDF
    The purpose of this project was to conduct a gap analysis that examined the needs of LIMMS users from system design and functionality to security. The analysis took into consideration the multiple platforms used by MassDOT currently for material and contract management. During the project, feedback was obtained from MassDOT users via private meetin ...
  • Steel Bridge Coating and Recoating Warranty Requirements
    Steel Bridge Coating and Recoating Warranty Requirements
    Padilla, Felix ;
    Ault, Pete
    2024-07-30 | PDF
    The service life of steel bridge coatings in Florida is occasionally shorter than the intended design life, resulting in the need for increased maintenance painting. This project examined the value of warranty terms potentially included in painting contracts to improve the quality and durability of steel bridge coatings. The research found that the ...
  • Investigation Crash Testing and Evaluation of a MASH TL4 Precast Concrete Bridge Rail
    Investigation, Crash Testing, and Evaluation of a MASH TL-4 Precast Concrete Bridge Rail
    Faller, Ronald K. ;
    Bielenberg, Robert W.
    2024-07-26 | PDF
    Recently, a precast concrete bridge barrier with unique connection details for barrier-to-deck and barrier-to-barrier interfaces was developed at the Institute of Transportation (InTrans)-Iowa State University (ISU) for ABC applications. Successful laboratory quasi-static tests led to the current study, in which the primary objectives were to deter ...
  • Artificial Intelligence AI and Markov Process Based Data Mining on Predicting Bridge Operating Conditions
    Artificial Intelligence (AI) and Markov Process Based Data Mining on Predicting Bridge Operating Conditions
    Fang, F Clara ;
    JimenezGil, Daniel
    2024-07-22 | PDF
    To facilitate bridge management decision-making and implement preventive maintenance strategies, we endeavor to develop a machine learning model to predict the future condition rating of bridges using historical inspection data, with a funding contract with Connecticut State’s Department of Transportation. We collect the data from the USA's Nationa ...
  • Chemical Subgrade Stabilization of Tennessee Soils Recommended Practices
    Chemical Subgrade Stabilization of Tennessee Soils – Recommended Practices
    VandenBerge, Daniel R ;
    Mohr, Benjamin J
    2024-07-15 | PDF
    This report summarizes the state-of-practice in the evaluation, design, and implementation of chemical subgrade stabilization. Four Tennessee soils (two A-6 and two A-7-6) were obtained and mix designs were prepared to provide examples of the testing required for chemical stabilization. The stabilized soils met the design unconfined strength criter ...
  • Design and Operational Assessment of a Railroad Track Robot for Railcar Undercarriage Condition Inspection Article
    Design and Operational Assessment of a Railroad Track Robot for Railcar Undercarriage Condition Inspection [Article]
    Ahmadian, Mehdi ;
    Kasch, James M
    2024-07-10 | PDF
    This research assesses the design and track operation of a track crawler robot (TCR) for practical and easy inspection of stationary railcars’ undercarriages in an effort to detect any pending failures or assess any security risk of out-of-sight objects. The TCR includes a drive system consisting of two AC motors that operate a track (like tank tra ...
  • Expanding Connected Vehicle Data Sources to Increase Applications and Use on Texas Roadways
    Expanding Connected Vehicle Data Sources to Increase Applications and Use on Texas Roadways
    McAuley, Anna ;
    Gold, Andrea
    2024-07-01 | PDF
    As connected freight and passenger vehicles become increasingly present on Texas roadways, the need for real-time, accurate, and cohesive data is growing. In some cases, this data is reliable and readily available to public agencies. In other cases, there are gaps in data availability or quality. A connected vehicle data framework (CVDF) enables th ...
  • Estimating the AsPlaced Grout Volume of Auger Cast Piles Part 1
    Estimating the As-Placed Grout Volume of Auger Cast Piles – Part 1
    Mullins, Gray ;
    Mee, Tristen
    2024-07-01 | PDF
    Auger cast piles have historically been used for private industry applications but not publicly funded infrastructure projects supporting bridge structures largely due to the lack of quantifiable quality assurance and quality controls. The development of computerized on-board drill rig monitoring systems and thermal integrity methods for auger cast ...
  • Local Verification of AASHTOWareTM Pavement ME Design for Flexible Pavement
    Local Verification of AASHTOWareTM Pavement ME Design for Flexible Pavement
    Tran, Nam ;
    Ajede, Akeem
    2024-07-01 | PDF
    This research project conducted a local verification to assess the accuracy of globally calibrated Pavement ME Design distress and smoothness models for asphalt pavements in Alabama. Pavement sections included LTPP test sections in Alabama and neighboring states, as well as sections tested at the NCAT Test Track. Results showed significant bias in ...
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