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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 36114 results
  • 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 ...
  • Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Khosravifar, Arash ;
    Dusicka, Peter
    2023-06-01 | PDF
    The potential Cascadia Subduction Zone (CSZ) megathrust earthquake is recognized as one of the major natural hazards affecting the Pacific Northwest of the United States. The estimation of expected ground-motions is complicated by the long-duration motions from CSZ as well as site effects from deep sedimentary basins in northwest Oregon. This study ...
  • Phase I Before Study Evaluation of Interstate 4 I4 Floridas Regional Advanced Mobility Elements FRAME Project Before Analysis Summary
    Phase I: Before Study Evaluation of Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements (FRAME) Project (Before Analysis) [Summary]
    Ponnaluri, Raj ;
    Abdel-Aty, Mohamed
    2023-06-01 | PDF
    The best way to find out if a transportation research project was meaningful is to check the numbers. The Florida Department of Transportation is laying the foundation to do that with a massive new undertaking that aims to capture safety and mobility conditions along Interstate 4 (I-4) from Orlando to Tampa.
  • Evaluation of SaturatesAromaticsResinsAsphaltenes SARA Fractionation of Asphalt Binders in Louisiana Research Project Capsule 221B
    Evaluation of Saturates/Aromatics/Resins/Asphaltenes (SARA) Fractionation of Asphalt Binders in Louisiana: Research Project Capsule [22-1B]
    Salari, Saman ;
    Mayeux, Corey R
    2023-06-01 | PDF
    The objective of this research is to evaluate the characterization of asphalt binder through TLC/FID testing and SARA grouping. The results will be further analyzed and compared with the available GPC results and other available characterizations of the asphalt binders. Furthermore, the results will be correlated with performance.
  • Performance of CostEffective NonProprietary UHPC in ThinBonded Bridge Overlays
    Performance of Cost-Effective Non-Proprietary UHPC in Thin-Bonded Bridge Overlays
    Khayat, Kamal H. ;
    Teng, Le
    2023-06-01 | PDF
    The constructability and performance of non-proprietary thixotropic UHPC for thin bonded bridge deck overlay construction was investigated. Task 1 reviewed literature on UHPC for thin bonded overlays and non-proprietary UHPC. Crack monitoring of experimental slabs cast with UHPC thin bonded overlay (MoDOT project TR201704) and pull-off bond strengt ...
  • Feasibility of NonProprietary UltraHigh Performance Concrete UHPC For Use in Highway Bridges in Montana Implementation
    Feasibility of Non-Proprietary Ultra-High Performance Concrete (UHPC) For Use in Highway Bridges in Montana: Implementation
    Berry, Michael ;
    Hendricks, Elias
    2023-06-01 | PDF
    Previous research conducted at MSU developed a nonproprietary UHPC mix design (MT-UHPC) that is significantly less expensive than commercially available mixes and is made with materials readily available in Montana. The focus of the research discussed herein was on the field implementation of MT-UHPC. Specifically, MT-UHPC was used in all field-cas ...
  • Data Interpretation of Automated Plate Load Test APLT for RealTime In Situ Determination of Unbound Layer Resilient Modulus
    Data Interpretation of Automated Plate Load Test (APLT) for Real-Time In Situ Determination of Unbound Layer Resilient Modulus
    Pajo, Bianka ;
    Becker, Peter
    2023-06-01 | PDF
    This project examined the results of an extensive program of (1) cyclic plate loading tests carried out at Purdue University’s S-BRITE site on two testing strips comprised of a coarse aggregate (Indiana #53) subbase layer compacted over either untreated or cement-stabilized subgrade, and (2) static loading tests conducted on #53 aggregate compacted ...
  • Assessment of the Mobility Energy Productivity MEP Metric for Transportation Applications in Florida
    Assessment of the Mobility Energy Productivity (MEP) Metric for Transportation Applications in Florida
    Jin, Xia ;
    Frolich, Daniel
    2023-06-01 | PDF
    This report outlines the use and application of the Mobility Energy Productivity (MEP) tool in evaluating the efficiency of transportation systems. The MEP metric assesses the quality of mobility in transportation systems, considering accessibility, energy consumption, and productivity. It incorporates time, cost, and energy-related measurements to ...
  • RailroadHighway Crossing Safety Improvement Evaluation and Prioritization Tool
    Railroad-Highway Crossing Safety Improvement Evaluation and Prioritization Tool
    Sriraj, P.S. ;
    Kawamura, Kazuya
    2023-06-01 | PDF
    The expected crash frequency model of Illinois Department of Transportation’s Bureau of Design and Environment needed improvement to incorporate track circuitry as well as pedestrian exposure at railroad-highway grade crossings to make the model more comprehensive. The researchers developed, calibrated, and validated three models to predict collisi ...
  • BIM Standards for Roads and Related Transportation Assets
    BIM Standards for Roads and Related Transportation Assets
    Hang, Li ;
    Hegazy, Hosam
    2023-06-01 | PDF
    With the industry foundation classes (IFC) building information modeling (BIM) standard (ISO 16739) being adopted by AASHTO as the national standard for modeling bridge and road infrastructure projects, there comes a great opportunity to upgrade the INDOT model development standard of roads and related assets to 2D+3D BIM. This upgrade complies wit ...
  • Stormwater Pond Maintenance and Wetland Management for Phosphorus Retention
    Stormwater Pond Maintenance, and Wetland Management for Phosphorus Retention
    Janke, Benjamin D ;
    Natarajan, Poornima
    2023-06-01 | PDF
    Reduction in phosphorus is critical because phosphate, a dissolved form of phosphorus, sustains algal and cyanobacteria growth and causes a wide range of water-quality impairments in the ponds and downstream waters including algal blooms, excess floating plants, taste, and odor problems. Many stormwater ponds and wetlands that treat stormwater appe ...
  • Design and Demonstration of an ArterialFriendly Local Ramp Metering Control System
    Design and Demonstration of an Arterial-Friendly Local Ramp Metering Control System
    Ke, Zemian ;
    Liu, Jiachao
    2023-06-01 | PDF
    This project aims to develop, assess, and optimize control strategies for ramp metering and local signal synchronization in Maryland's Transportation Systems Management and Operations (TSMO) 1 system (I-70 corridor east of Baltimore, MD). The methodology and mesoscopic simulation model can be generally applicable to other networks and TSMO systems. ...
  • Safest Placement for Crosswalks at Intersections
    Safest Placement for Crosswalks at Intersections
    Hurwitz, David ;
    Chai, Eileen
    2023-06-01 | PDF
    This research studied the relationship between crosswalk setback and intersection safety. The study included field-based and driving simulator experiments. Video data was collected at 10 crosswalks in Oregon to examine the frequency pedestrian-vehicle conflicts (measured using PET), including how these conflicts vary between corner and setback cros ...
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