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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 1581 - 1600 of 36104 results
  • Pilot Testing of Work Zone Intrusion Alarms
    Pilot Testing of Work Zone Intrusion Alarms
    Khan, Ghazan ;
    Cochrane, Raven
    2023-11-16 | PDF
    The main goal for this research was to evaluate the effectiveness and practicality of deploying and operating selected WZIA systems in California work zones. The objective was to provide recommendations and guidance to Caltrans on implementing such systems in real-world conditions through field observations and feedback provided by the Caltrans mai ...
  • Continuation of Joint and Full Waveform Inversion To Improve Evaluation of Sinkholes and Karst Features
    Continuation of Joint and Full Waveform Inversion To Improve Evaluation of Sinkholes and Karst Features
    Coe, Joseph ;
    Abboud, Bechara
    2023-11-10 | PDF
    Geophysical methods can provide fast and reliable information regarding sinkholes and karst features over a broad area of coverage. Often, these geophysical methods involve the solution to an inversion problem to deduce subsurface details based on surface measurements. Solution of the inversion problem is a non-trivial issue that has warranted sign ...
  • Development of LatitudeLongitude and RouteMilepost Positioning Traffic Management Cameras
    Development of Latitude/Longitude (and Route/Milepost) Positioning Traffic Management Cameras
    Mathew, Jijo K ;
    Malackowski, Haydn A
    2023-11-01 | PDF
    Traffic Incident Management (TIM) is a FHWA Every Day Counts initiative with the objective of reducing secondary crashes, improving travel reliability, and ensuring the safety of responders. Agency roadside cameras play a critical role in TIM by helping dispatchers quickly identify the precise location of incidents when receiving reports from motor ...
  • 2022 MnROAD Construction Activities
    2022 MnROAD Construction Activities
    Bautista, Emil G. ;
    Wallace, Michael
    2023-11-01 | PDF
    The 2022 construction season at the MnROAD facility saw construction of 39 new and unique pavement test sections and the repairs of 6 existing test sections. These sections were planned and designed by the National Road Research Alliance (NRRA) teams to address high-priority research needs. This report details development, design, and construction ...
  • Vulnerable Road User VRU Safety Assessment
    Vulnerable Road User (VRU) Safety Assessment
    Sun, Carlos ;
    Brown, Henry
    2023-11-01 | PDF
    Vulnerable Road Users (VRUs) are nonmotorized road users, such as pedestrians and bicyclists, who do not have the protection of a vehicle shell. VRU injuries and fatalities have been increasing, leading to various efforts to assess and improve VRU safety. One such state-level effort is the development of a Missouri VRU safety assessment plan. This ...
  • Forecasting Shifts in Hoosiers Travel Demand and Behavior
    Forecasting Shifts in Hoosiers’ Travel Demand and Behavior
    Verma, Rajat ;
    Luo, Hao
    2023-11-01 | PDF
    The changing landscape of transportation technology and traveler behavior, accelerated by recent events like COVID-19, has led to significant shifts in travel demand and vehicle miles traveled in Indiana. This study seeks to understand the long-term implications of these changes and their potential impact on passenger, freight, and micro-mobility m ...
  • Safety and Traffic Operations at Cloverleaf Interchanges Project Capsules
    Safety and Traffic Operations at Cloverleaf Interchanges [Project Capsules]
    Hassan, Hany ;
    Rupnow, Tyson
    2023-11-01 | PDF
    The efficient operation of highway interchanges is critical for the creation of an effective highway system designed to transport large numbers of cars quickly and safely over long distances. In this regard, the diamond interchange is the most common type of roadway interchanges where a major highway intersects a minor facility. It is suited for bo ...
  • Evaluation of NearMiss Crashes Using a VideoBased Tool
    Evaluation of Near-Miss Crashes Using a Video-Based Tool
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2023-11-01 | PDF
    This research investigated the prediction accuracy of a video-based tool developed by Transoft Solutions for predicting near-miss crashes at signalized intersections. The research team selected two signalized intersections in Overland Park, Kansas, and collected two weeks of video data from both locations. Only weekday data were collected for the t ...
  • Validation of Loose Mix Aging Procedures for Cracking Resistance Evaluation in Balanced Mix Design
    Validation of Loose Mix Aging Procedures for Cracking Resistance Evaluation in Balanced Mix Design
    Yin, Fan ;
    Chen, Chen
    2023-11-01 | PDF
    This project aimed to validate loose mix aging procedures for cracking resistance evaluation of asphalt mixtures in balanced mix design (BMD) with a broad range of field projects covering various mixture components, pavement ages, and climatic conditions. To that end, a two-phase research approach was followed, with Phase I focusing on a literature ...
  • Division of Engineering Research on Call Agreement 34652 Task 12 Change Detection of Inventoried Landslides Using Remote Sensing Techniques
    Division of Engineering Research on Call, Agreement 34652. Task 12, Change Detection of Inventoried Landslides Using Remote Sensing Techniques
    Bassal, Patrick ;
    Athar, M Faraz
    2023-11-01 | PDF
    This study evaluates the effectiveness of utilizing remotely sensed three-dimensional (3D) spatial data, including Light Detection and Ranging(lidar) and Interferometric Synthetic Aperture Radar (InSAR) for interpreting change detections of eastern Ohio (Districts 5, 10, and 11) landslides. The performance of lidar methods used by specialty firm Te ...
  • 59GHz Interference Resiliency for Connected Vehicle Equipment
    5.9GHz Interference Resiliency for Connected Vehicle Equipment
    Kihei, Billy ;
    Barclay, Chase
    2023-11-01 | PDF
    There are new Wi-Fi channels in the 5.9GHz Dedicated Short Communications Band in the United States which once was licensed spectrum exclusively for IEEE 802.11p connected vehicle devices. Existing literature reports through simulations and modelling that unlicensed interference from low-cost Wi-Fi devices could degrade the quality of IEEE 802.11p ...
  • Results of Work Zone Queue Analysis Training Classes
    Results of Work Zone Queue Analysis Training Classes
    Benekohal, Rahim F ;
    Jeon, Hongjae
    2023-11-01 | PDF
    This white paper summarizes the results from three training classes on queue analysis in work zones. Accurately predicting the mobility impacts of work zones will enable designers to identify effective countermeasures to improve mobility and safety in work zones. The course provides hands-on training on basic analytical methods (queue analysis meth ...
  • Utilizing Steel Fiber Reinforced Concrete as a Substitute Reinforcement for CIPPCP Bridge Deck
    Utilizing Steel Fiber Reinforced Concrete as a Substitute Reinforcement for CIP-PCP Bridge Deck
    Jeong, Soon Kwang ;
    Jang, Hansol
    2023-11-01 | PDF
    This research focuses on optimizing the design of cast-in-place, precast-panel (CIP-PCP) bridge decks by developing recommendations for standard ready-mix steel fiber reinforced concrete (SFRC) using domestically produced steel fibers. The project, stemming from the efficient and durable nature of CIP-PCP decks, builds upon prior work at the Univer ...
  • Division of Planning ROC 202414 Task 1 ODOT Local Programs Data Systems Peer Exchange 2023
    Division of Planning ROC 2024-14 Task 1: ODOT Local Programs Data Systems Peer Exchange 2023
    Abbas, Ala R. ;
    Patnaik, Anil
    2023-11-01 | PDF
    The Ohio DOT Office of Local Programs hosted a peer exchange meeting on July 25–26, 2023. The peer exchange meeting was held for the purpose of benchmarking Ohio’s local-let program with those of departments of transportation (DOTs) in other states; collecting information and input on technological advances for data capture, reporting, and assuranc ...
  • Highway Safety Culture Assessment through Louisianas Regions Summary
    Highway Safety Culture Assessment through Louisiana’s Regions [Summary]
    Schneider, Helmut ;
    Mitran, Elisabeta
    2023-11-01 | PDF
    Very bluntly, culture matters, particularly related to daily, human behaviors. Culture signifies a feature of individuals that affects multiple components of daily life, such as rearing children and acceptance of risk and health outcomes. Correspondingly, driving represents an essential feature of who we are as individuals. As driver and passenger ...
  • Evaluating and Communicating the Value of Research Brochure and Task Checklists Factsheet
    Evaluating and Communicating the Value of Research Brochure and Task Checklists [Factsheet]
    Minnesota Local Road Research Board
    2023-11-01 | PDF
    This brochure accompanies Report 2023-39, "Evaluating and Communicating the Value of Research," published November 2023.
  • US191MT64 Wildlife Transportation Assessment
    US-191/MT-64 Wildlife & Transportation Assessment
    Fairbank, Elizabeth R. ;
    Penrod, Kristeen
    2023-11-01 | PDF
    The US Highway 191 (US-191)/Montana Highway 64 (MT-64) Wildlife & Transportation Assessment (the “Assessment”) improves understanding of the issues affecting driver safety, wildlife mortality, and wildlife movement along the major routes that connect Yellowstone National Park, the Custer Gallatin National Forest, and other public lands to the growi ...
  • Develop Bridge WeighinMotion Approach To Measure Live Loads on Texas Highways Technical Report
    Develop Bridge Weigh-in-Motion Approach To Measure Live Loads on Texas Highways: Technical Report
    Yarnold, Matthew ;
    Shi, Shengyi
    2023-11-01 | PDF
    This research study developed and quantitatively evaluated the concept of Bridge Weigh-In-Motion (B-WIM) for future application on Texas highways. The primary objective of B-WIM systems is to instrument a bridge to obtain the axle information (i.e., weights, number, speed, and spacings) and weight information (i.e., axles and gross) of trucks that ...
  • Bridge and Culvert Designs for Reduced WildlifeVehicle Conflicts and Improved Climate Resiliency Phase I
    Bridge and Culvert Designs for Reduced Wildlife-Vehicle Conflicts and Improved Climate Resiliency: Phase I
    Gómez, Alejandra ;
    Maerz, John
    2023-11-01 | PDF
    Wildlife vehicle conflicts (WVC) average over 14,000 crashes and cost more than $850M per year in Georgia (FHWA 2023). Our research team has undertaken a Phase I study to identify opportunities to simultaneously improve road safety, reduce wildlife vehicle conflicts (WVC), effectively ensure water and debris conveyance capacity, enhance ecosystem c ...
  • Determining the Effect on Asphalt Mixture Performance by Increasing New Asphalt Binder Content Due to Inactive RAP Binder in the Mixture
    Determining the Effect on Asphalt Mixture Performance by Increasing New Asphalt Binder Content Due to Inactive RAP Binder in the Mixture
    Yin, Fan ;
    Taylor, Adam
    2023-11-01 | PDF
    The project aimed to determine the impact of adding additional virgin binders in consideration of recycled binder availability (RBA) on the performance of asphalt mixtures containing reclaimed asphalt pavements (RAP). To that end, a literature review was first conducted to select a suitable RBA value (i.e., 80%) for RBA mixtures in Florida, followe ...
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