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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 721 - 740 of 35815 results
  • Leveraging Probe Data for Improving Incident Management Practice in Rural Areas
    Leveraging Probe Data for Improving Incident Management Practice in Rural Areas
    Yang, Jidong J ;
    Wang, Linbing
    2024-11-01 | PDF
    Traffic data are essential for decision-making by state departments of transportation in planning, designing, operating, maintaining, and rehabilitating transportation systems. However, collecting traffic counts at numerous portable sites in rural areas demands significant time and resources. In response, the Georgia Department of Transportation (G ...
  • Validating the Collection of Skid Data by Assessing Correlation With Crash Data
    Validating the Collection of Skid Data by Assessing Correlation With Crash Data
    Acharya, Sailesh ;
    Subedi, Atul
    2024-11-01 | PDF
    Pavement friction, as measured by metrics such as the skid number (SN), may be linked to traffic safety outcomes. To examine this hypothesis, this cross-sectional study collected data from an interstate highway (I-15) and a non-interstate highway (US-89) within the state of Utah, covering the years 2016 to 2019. For each segment, data included traf ...
  • Report on Agency Survey and National Bridge Inventory Analysis for Damaged Steel Girders
    Report on Agency Survey and National Bridge Inventory Analysis for Damaged Steel Girders
    Schissler, Limo R ;
    Ahershinge, Sanjana
    2024-11-01 | PDF
    Bridge strikes—events where over-height vehicles impact bridge superstructures—are common across the United States and pose significant challenges for bridge owners. When a bridge strike occurs, bridge owners must assess the damage and determine what, if any, action is required. A survey of state highway agencies was conducted, and 23 responses wer ...
  • Safer by Design Pavement Friction
    Safer by Design: Pavement Friction
    Goehl, Darlene C ;
    Nyamuhokya, Tito
    2024-11-01 | PDF
    Minimizing pavement impact on wet weather crashes is essential to the Wet Surface Crash Reduction Program (WSCRP). Currently, the Texas Department of Transportation has two methods to evaluate pavement friction: the Safer by Design (SBD) method and the pavement surface aggregate classification selection, Form 2088. The research team developed a fra ...
  • Dowel Concrete Interface Material Categorization Performance in Isolated Test Slabs
    Dowel — Concrete Interface Material Categorization & Performance in Isolated Test Slabs
    Izevbekhai, Bernard Igbafen ;
    Aydin, Ceren
    2024-11-01 | PDF
    The Minnesota Department of Transportation (MnDOT) investigated the use of dowel bars with various anchoring methods. This report examines the characteristics of various epoxy and grout anchorage systems at the interface between new construction and existing concrete. Twelve different anchoring materials as well as various anchoring methods were st ...
  • The Effects of Truck Platooning on the Kansas Workforce
    The Effects of Truck Platooning on the Kansas Workforce
    Kondyli, Alexandra ;
    Mahajan, Kirti
    2024-11-01 | PDF
    The objective of this project was to evaluate the expected impacts of truck automation and platooning on the Kansas workforce and formulate strategies to mitigate potential negative effects. The study was comprised of two phases: (1) a systematic literature review and (2) the compilation of insights from industry, workforce, and policymakers to cre ...
  • Durability of Concrete Using Low Slag Cement Contents Brief
    Durability of Concrete Using Low Slag Cement Contents [Brief]
    Riding, Kyle A
    ORCID ICON IMG
    2024-11-01 | 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 ...
  • The Effects of Truck Platooning on the Kansas Workforce Summary
    The Effects of Truck Platooning on the Kansas Workforce [Summary]
    Kondyli, Alexandra ;
    Mahajan, Kirti
    2024-11-01 | PDF
    The concept of automated freight transit began with platooning, which refers to one leading truck with a driver that controls two or three driverless, wirelessly connected trucks that follow at closely spaced gaps. Modern technology often displaces current jobs and required skills over time, but the potential for the high displacement of profession ...
  • Improving the LongTerm Condition of Pavements in Massachusetts and Determining Return on Investment Implementing the AASHTO
    Improving the Long-Term Condition of Pavements in Massachusetts and Determining Return on Investment: Implementing the AASHTO
    Von Quintus, Harold L. ;
    Sufian, Abu A
    2024-11-01 | PDF
    The Massachusetts Department of Transportation (MassDOT) has sponsored multiple projects to implement the Mechanistic-Empirical Pavement Design Guide (MEPDG). Due to the complexity of this research, a four-phase approach spanning several years was proposed. This report focuses on Phase 3. In Phase 3, MassDOT concentrated on using the Long-Term Pave ...
  • Economic Contribution of Kentucky Airports
    Economic Contribution of Kentucky Airports
    Marks, P. Gayle ;
    Paris, Bethany
    2024-11-01 | PDF
    Airports generate economic impacts that are felt well beyond their physical boundaries by supporting commerce, tourism, and the provision of essential services. To understand the economic contributions of airports throughout Kentucky, researchers collected data from general aviation (GA) airports and commercial service (CS) airports across the stat ...
  • Improved Light Weight Deflectometer Test LWD and Analysis
    Improved Light Weight Deflectometer Test (LWD) and Analysis
    Tiwari, Nitin ;
    Shin, Boonam
    2024-11-01 | PDF
    This study focused on improving light weight deflectometer (LWD) testing protocols and understanding material and equipment variability. The Indiana Department of Transportation (INDOT) adopted the LWD test for its efficiency and effectiveness in measuring soil stiffness, a crucial parameter for pavement structural layers. However, challenges remai ...
  • Improved Light Weight Deflectometer Test LWD and Analysis Summary
    Improved Light Weight Deflectometer Test (LWD) and Analysis [Summary]
    Shin, Boonam ;
    Tiwari, Nitin
    2024-11-01 | PDF
    This study focused on improving light weight deflectometer (LWD) testing protocols and understanding material and equipment variability. The Indiana Department of Transportation (INDOT) adopted the LWD test for its efficiency and effectiveness in measuring soil stiffness, a crucial parameter for pavement structural layers. However, challenges remai ...
  • InterLaboratory Study ILS of Bituminous Concrete Balanced Mix Design BMD Tests for Use on VTrans Projects
    Inter-Laboratory Study (ILS) of Bituminous Concrete Balanced Mix Design (BMD) Tests for Use on VTrans Projects
    Mahoney, James ;
    Bernier, Alex
    2024-10-31 | PDF
    Many state departments of transportation across the US are in various stages and levels of implementation of performance testing for Balanced Mix Design (BMD). The tests are intended to provide data to the designer with the goal of developing a mix design that balances adequate resistance to rutting and stripping with resistance to thermal and stre ...
  • Implementation Product Executive Summary of The FiveStage Workforce Development Lifecycle Project
    Implementation Product: Executive Summary of The Five-Stage Workforce Development Lifecycle Project
    Belk, Ray L
    2024-10-31 | PDF
    Implementation Product #1 (P1) addresses the following in matrix format: 1. A summary of technical assistance provided throughout the project. 2. Results of product validation. 3. Implementation success stories.
  • Final Project Report The 5Stage Workforce Development Lifecycle Project
    Final Project Report: The 5-Stage Workforce Development Lifecycle Project
    Belk, Ray L
    2024-10-31 | PDF
    This Final Project Report (FPR) addresses: 1. Description of the project. 2. The overall budget. 3. How the work performed met program criteria. 4. Results of the project. 5. Challenges and lessons learned.
  • RFID and Wireless IoT Technologies for Transportation Maintenance Operations and Asset Management
    RFID and Wireless IoT Technologies for Transportation Maintenance Operations and Asset Management
    Xia, Tian ;
    Lee, Byung
    2024-10-31 | PDF
    This final report summarizes the results of the novel strategy for managing transportation resources, making use of radio-frequency identification (RFID) technology. Through the utilization of RFID's capacity for remote detecting, the system achieves real-time identification of transportation assets, resulting in substantial enhancements in operati ...
  • Develop Guidelines for Integration of UAS LiDAR and Photogrammetry to Enhance Land Surveying Capabilities Project Summary Report
    Develop Guidelines for Integration of UAS LiDAR and Photogrammetry to Enhance Land Surveying Capabilities [Project Summary Report]
    Starek, Michael J. ;
    Berryhill, Jacob
    2024-10-30 | PDF
    The researchers completed twelve UAS data collection field tests, ten at TxDOT district project sites and two at development test sites, using SfM and LiDAR. Two grades of LiDAR scanners were evaluated based on their ranging capabilities and quality of their position and orientation systems. Data collections were conducted across all four seasons i ...
  • City of Hamilton State Street Traffic Calming Project July 19October 15 2024
    City of Hamilton State Street Traffic Calming Project: July 19–October 15, 2024
    Madsen, Matthew ;
    Gleason, Rebecca
    2024-10-30 | PDF
    The Western Transportation Institute (WTI) has been coordinating with Bike Walk Montana and the Montana Department of Commerce’s Main Street Program to help small towns with pop-up projects aimed at slowing traffic to create safer streets. The Department of Commerce suggested opportunities for pop-up traffic calming in Hamilton, Montana, where City ...
  • West Yellowstone Highway 20 Traffic Calming Project July 23rd October 15th 2024
    West Yellowstone Highway 20 Traffic Calming Project: July 23rd – October 15th, 2024
    Gleason, Rebecca ;
    Madsen, Matthew
    2024-10-25 | PDF
    The West Yellowstone Business Improvement Advisory Board (BIAB) reached out to the Western Transportation Institute (WTI) in fall 2023 to request help slowing traffic through W. Yellowstone, Montana, to create safer streets, especially for pedestrians. In October 2023, WTI met with Montana Department of Transportation (MDT) staff to discuss the pos ...
  • Informed Safety Mobility and Driver Comfort Enhancement Practices for Work Zones Learnings from HighFidelity Data
    Informed Safety, Mobility, and Driver Comfort Enhancement Practices for Work Zones: Learnings from High-Fidelity Data
    Mishra, Sabyasachee ;
    Golias, Mihalis M.
    2024-10-15 | PDF
    This study leverages high-fidelity observational data to analyze driver behavior and vehicle dynamics within work zones (WZs) on Tennessee’s interstate highways, aiming to evaluate critical aspects of safety, mobility, and driver comfort. Data were collected over several months from GPS, IMU sensors, and video recordings on commercial vehicles trav ...
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