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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 1921 - 1940 of 36151 results
  • Development of a Test to Quantify Organic Content in Silica Sand Summary
    Development of a Test to Quantify Organic Content in Silica Sand [Summary]
    Shoucair, John ;
    Morrison, Elise
    2023-07-01 | PDF
    The objective of this project was to determine whether a modifed Walkley Black test or elemental analysis of carbon test can be used as a substitute test for the AASHTO T21 or AASHTO T71 tests.
  • Evaluation of Nondestructive Test Pilot Projects Research Project Capsule 232B
    Evaluation of Non-destructive Test Pilot Projects: Research Project Capsule [23–2B]
    Akentuna, Moses ;
    Rupnow, Moses
    2023-07-01 | PDF
    The objective of this research is to collect and analyze data from non-destructive testing (NDT) pilot projects proposed in LTRC project 17-2B for implementation in section 502 of the Louisiana Standard Specifications for Roads and Bridges.
  • North Dakota Statewide Traffic Safety Survey 2023 Traffic Safety Performance Measures for State and Federal Agencies
    North Dakota Statewide Traffic Safety Survey, 2023: Traffic Safety Performance Measures for State and Federal Agencies
    Vachal, Kimberly ;
    Kubas, Andrew
    2023-07-01 | PDF
    The statewide driver traffic safety survey provides baseline metrics for the Highway Safety Division and others to use in understanding perceptions and self-reported behaviors related to focus issues. A core set of questions addressed nationally agreed upon priorities, including seat belts, impaired driving, and speeding. In addition to the core is ...
  • NETC Project 211 Quality Review and Assessment of Pavement Condition Survey Vehicle Data Across New England Pavement Data Quality Guidelines
    NETC Project 21–1: Quality Review and Assessment of Pavement Condition Survey Vehicle Data Across New England: Pavement Data Quality Guidelines
    New England Transportation Consortium
    2023-07-01 | PDF
    The New England Transportation Consortium (NETC) members consist of Maine (ME), Connecticut (CT), Massachusetts (MA), New Hampshire (NH), Rhode Island (RI), and Vermont (VT) transportation agencies. The member agencies spend a considerable amount of time and resources on pavement surface data collection. The data collected are used for a wide range ...
  • Open Framework Standards for Combined Aircraft Sensor Network for the State of Ohio to Detect and Track Lower Altitude Aircraft Fact Sheet
    Open Framework Standards for Combined Aircraft Sensor Network for the State of Ohio to Detect and Track Lower Altitude Aircraft [Fact Sheet]
    Calhoun, Sean ;
    Adami, Tony
    2023-07-01 | PDF
    As research, development and overall investment continues to accelerate the integration of Uncrewed Aircraft Systems (UAS or drones) into our skies, it is becoming ever more critical to develop supporting systems and services that are based on sound engineering and strategic planning. Reliable and robust airspace surveillance for the lower altitude ...
  • 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 ...
  • Use of Infrared Thermography for the Inspection of Welds in the Shop and Field Phase II
    Use of Infrared Thermography for the Inspection of Welds in the Shop and Field – Phase II
    Manuel, Michele
    2023-07-01 | PDF
    The research focused on demonstrating and implementing infrared thermography nondestructive technique (IR-TNDT) methods in-service for inspecting aluminum (Al) and steel welds in complex structures. The study was applied to in-shop and mock in-field conditions. After a thorough literature review, this report presents the qualification of defect man ...
  • Behavioral Safety Project
    Behavioral Safety Project
    Guler, S Ilgin ;
    Gayah, Vikash V.
    2023-06-30 | PDF
    Careful data-driven analysis of these key focus areas is needed to provide guidance on the most cost-effective methods to improve safety performance from a behavioral perspective. The objective of this project was to develop a behavioral traffic safety-related data analysis report that identifies behavioral issues that may contribute to crashes and ...
  • Development of Advanced Landslide Investigation Protocol Using Geophysical Methods for Mississippi
    Development of Advanced Landslide Investigation Protocol Using Geophysical Methods for Mississippi
    Khan, Sadik ;
    Amini, Farshad
    2023-06-30 | PDF
    Slope failures frequently occur in highway embankments in Mississippi due to the existence of highly expansive Yazoo Clay. In addition, the Mississippi climate, especially the high volume of precipitation, plays a major role in the development of landslides. State Study 316 was undertaken to evaluate the landslides throughout the states employing A ...
  • Performance of UltraThin Bonded Wearing Course UTBWC During Winter Snow Ice Events in Maryland
    Performance of Ultra-Thin Bonded Wearing Course (UTBWC) During Winter Snow Ice Events in Maryland
    Goulias, Dimitrios ;
    Zhao, Yunpeng
    2023-06-30 | PDF
    Ultra-Thin Bonded Wearing Course (UTBWC) pavement surfacing was developed as a preventative maintenance option to extend pavement life. Despite the successful applications of UTBWC in various states, feedback from winter maintenance crews indicates icing accumulation on some UTBWC surfaces in Maryland during winter storms, and thus current salting ...
  • Investigating Thermal Imaging Technologies and Unmanned Aerial Vehicles to Improve Bridge Inspections
    Investigating Thermal Imaging Technologies and Unmanned Aerial Vehicles to Improve Bridge Inspections
    Ahearn, Kevin ;
    Seston, Brady
    2023-06-30 | PDF
    The overall research objective is to focus on developing UAV-based inspection and analysis protocols using infrared (IR) thermal imaging to determine the existence and extent of concrete delamination, with emphasis on the underside of bridge decks. The research was implemented through 5 tasks: 1. Desk scan of infrared thermal imaging and unmanned a ...
  • Technology of Mapping and NDT for Pipes Inspection
    Technology of Mapping and NDT for Pipes Inspection
    Hamoush, Sameer ;
    Yi, Sun
    2023-06-30 | PDF
    This project aimed to implement the advances in new technologies to develop a robotic-based autonomous inspection system for underground pipelines. The new technology is based on the combination of intelligent powerful portable software and the newly advancement in mapping techniques. The system can scan and reconstruct the 3D profile of a pipeline ...
  • Resiliency of Prestressed Concrete Beams Exposed to Fire
    Resiliency of Prestressed Concrete Beams Exposed to Fire
    Zhu, Zheda ;
    Quiel, Spencer E.
    2023-06-30 | PDF
    Numerical simulations were used to investigate the thermo-structural response of simple span prestressed bulb-T concrete bridge girders to fire hazards located underneath the bridge. The approach consists of three steps: (1) fire modeling, (2) heat transfer modeling, and (3) structural modeling. The effects of thermal concrete spalling are accounte ...
  • Investigating Concrete Deck Cracking in Continuous Steel Bridges
    Investigating Concrete Deck Cracking in Continuous Steel Bridges
    Heymsfield, Ernie. ;
    Murray, Cameron D.
    2023-06-29 | PDF
    Bridge deck cracking reduces serviceability and lifespan of bridges. Early age cracking can typically be attributed to either of two factors: 1) construction practices and 2) concrete shrinkage. The Arkansas Department of Transportation ARDOT has identified a disproportionate number of continuous steel girder bridges experiencing early age bridge d ...
  • Innovation Tools and Concept Strategies for System Planning
    Innovation Tools and Concept Strategies for System Planning
    Chandra, Shailesh ;
    Balali, Vahid
    2023-06-29 | PDF
    Technology awareness, use, and application are required to realistically and accurately model strategies (and their performance measures) that define success in corridor planning. Performance measures derived from each implementable strategy through a project that improves mobility, safety, reliability, sustainability, and equity are helpful to pol ...
  • Balsi Beam Implementation Research
    Balsi Beam Implementation Research
    Ravani, Bahram ;
    Delshad, Saeid
    2023-06-27 | PDF
    The Balsi Beam system was developed by Caltrans as a Mobile Work Zone Protection System for worker protection. The system is integrated as a self-contained tractor trailer system with telescoping beams which can be deployed to a work zone and adjusted in length without a need for a crane or any other equipment. There are, however, no guidelines for ...
  • Implementation and Evaluation of Aira Access Pilot Run in Connecticut
    Implementation and Evaluation of Aira Access Pilot Run in Connecticut
    Shaon, Mohammad Razaur Rahman ;
    Shirani, Niloufar
    2023-06-14 | PDF
    The goal of this project is to implement Aira, one of the fastest-growing assistive technology options for people who are blind or have low vision, across the entire State of Connecticut, to be used for navigation, wayfinding, riding public transportation, and to ensure proper social distancing for blind-low vision (BLV) individuals. The University ...
  • Safety Evaluation of Alternatives for Installing Pedestrian Signals Under Side Street Green Operation
    Safety Evaluation of Alternatives for Installing Pedestrian Signals Under Side Street Green Operation
    Ivan, John N. ;
    Wang, Kai
    2023-06-14 | PDF
    The objective of this project was to carry out a safety evaluation of conversion of intersections owned by CTDOT operating under side street green pedestrian phasing to concurrent pedestrian phasing. Side street green phasing means that pedestrians cross the main road during the minor road green phase, and there is no special pedestrian phasing or ...
  • WestWide Study To Identify Important Highway Locations for Wildlife Crossings
    West-Wide Study To Identify Important Highway Locations for Wildlife Crossings
    Paul, Kylie ;
    Faselt, Jamie
    2023-06-02 | PDF
    Wildlife-vehicle collisions (WVCs), reduced ecological connectivity, and associated impacts to wildlife and humans are widespread problems across road networks, but mitigation measures like wildlife crossings1 that can address those problems are often considered expensive. This effort aims to support transportation agencies, wildlife agencies and o ...
  • Smart Mobility Blueprint for Illinois
    Smart Mobility Blueprint for Illinois
    Jayme, Angeli ;
    Usta, Berkan
    2023-06-01 | PDF
    Connected, automated, shared, and electric (CASE) technologies have invoked Mobility 4.0—a connected, digitized, multimodal, and autonomous system of systems. This project established a flexible and adaptable blueprint that would streamline multidisciplinary and multistakeholder efforts as well as leverage available resources to prepare the Illinoi ...
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