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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 1161 - 1180 of 36049 results
  • DeepLearningBased Radio Channel Prediction for VehicletoVehicle Communications Project Summary
    Deep-Learning-Based Radio Channel Prediction for Vehicle-to-Vehicle Communications [Project Summary]
    Molisch, Andreas F
    ORCID ICON IMG
    2024-05-31 | PDF
    Driver-assistance systems are essential to reduce accidents and improve energy efficiency through efficient convoying. To improve their effectiveness, it is important that vehicles are able to communicate with each other, informing each other of their intentions, and warning each other of obstacles or cross traffic that only some of the vehicles mi ...
  • 07088 Develop Closure Joint Materials Specification and Evaluate Performance for SidebySide Accelerated Bridge Construction ABC Superstructure Systems
    0-7088: Develop Closure Joint Materials Specification and Evaluate Performance for Side-by-Side Accelerated Bridge Construction (ABC) Superstructure Systems
    Dassi, Martin ;
    Folliard, Kevin J.
    2024-05-31 | PDF
    The goal of this project was to develop, investigate, and implement optimized concrete mixtures to be used in closure pour connections between precast elements in side-by-side accelerated bridge construction (ABC) superstructure systems. This project involves the use of innovative materials and mixture proportions that are intended to provide high ...
  • Effect of Antioxidant Additives and Recycling Agents on Performance of Asphalt Binders and Mixtures Phase I
    Effect of Antioxidant Additives and Recycling Agents on Performance of Asphalt Binders and Mixtures – Phase I
    Bastola, Nitish R ;
    Khedmati, Mahdieh
    2024-05-31 | PDF
    The use of reclaimed asphalt pavement (RAP) in asphalt mixtures has notably increased in recent times. Nevertheless, the inherent stiff and aged characteristics of RAP materials have consistently raised concerns regarding cracking performance. The use of recycling agents (RAs) has gained popularity in recent years since they can effectively modify ...
  • Development of NextGen Texas Bridge Decks Project Summary Report
    Development of NextGen Texas Bridge Decks [Project Summary Report]
    Bayrak, Oguzhan ;
    Wang, Hwa-Ching
    2024-05-31 | PDF
    Under the coverage of Project 0-7041, a comprehensive research initiative was undertaken to develop and validate the NextGen Texas bridge deck system. The research endeavors encompassed a multi-phase approach, combining rigorous experimental investigation with advanced nonlinear finite element analysis. The primary objective was to evaluate the beh ...
  • Automatic Tools for Quick and Accurate Construction Cost Estimation for Retaining Walls
    Automatic Tools for Quick and Accurate Construction Cost Estimation for Retaining Walls
    Camp, Charles V ;
    Arellano, David
    2024-05-31 | PDF
    Managing construction costs and budgets remains a top priority of TDOT in allocating resources provided by taxpayers. Estimating project costs accurately is critical to ensuring that projects are delivered in the fiscal year they were planned. This project developed a Retaining Wall Probable Bid Price Estimating Tool to provide accurate estimates o ...
  • Integration of Thermal Infrared IR Imaging into the Caltrans Inspection Program for Pavements and Bridge Decks
    Integration of Thermal Infrared (IR) Imaging into the Caltrans Inspection Program for Pavements and Bridge Decks
    Yen, Kin S. ;
    Swanston, Travis
    2024-05-30 | PDF
    The California Department of Transportation (Caltrans) must inspect pavement and bridge decks to support proactive infrastructure maintenance. By leveraging non-destructive evaluation technologies for sensing and data processing, Caltrans would improve the speed and efficiency of this critical duty. The Strategic Highway Research Program recognized ...
  • Approach Guardrail Transition Retrofit to Existing Buttresses Bridge Rails
    Approach Guardrail Transition Retrofit to Existing Buttresses & Bridge Rails
    Rosenbaugh, Scott K. ;
    Fang, Chen
    2024-05-15 | PDF
    The Nebraska Department of Transportation (NDOT) frequently applies roadway overlays to the surface of bridges to extend the bridge’s lifespan. To minimize repair costs, NDOT does not desire to replace or alter any bridge rails with adequate structural capacity and height. Bridge rails installed to NCHRP Report 350 or MASH standards are likely to r ...
  • BRACE2 Bridge Rapid Assessment Center for Extreme Events Phase I Final Report
    BRACE2: Bridge Rapid Assessment Center for Extreme Events Phase I Final Report
    Chern, Chrystal ;
    Perez, Claudio
    2024-05-12 | PDF
    This report documents the findings of the BRACE2 project. In order to accommodate the interdisciplinary nature of such an undertaking, this document is divided into four parts which are each designed for a particular target audience. Part I develops a high-level overview of the BRACE2 web application that is targeted at decision makers and engineer ...
  • Automated Vehicle and Pavement Marking Evaluation in Connecticut
    Automated Vehicle and Pavement Marking Evaluation in Connecticut
    Shaon, Mohammad Razuar ;
    Orlova, Elena
    2024-05-06 | PDF
    The condition, visibility, and contrast of longitudinal pavement markings are critical to roadway safety and have been used for decades by infrastructure owner operators (IOOs) as a frame of reference to communicate to drivers how to navigate roadways. Over the last decade, vehicle manufacturers have also begun incorporating new intelligent, advanc ...
  • Impact of Truck Platooning on Loading of Bridges in Oregon
    Impact of Truck Platooning on Loading of Bridges in Oregon
    Scott, Michael ;
    Schumacher, Thomas
    2024-05-01 | PDF
    Truck platooning is an autonomous vehicle technology where multiple heavy trucks operate at close spacing. In 2018, Oregon House Bill HB 4059 Section 40 allowed limited implementation of such technology without requiring permitting or notification to ODOT. However, the close spacing of platooned trucks may impose loading on some bridges in excess o ...
  • Assessment of the Impact of Unacceptable HotMix Asphalt Test Parameters
    Assessment of the Impact of Unacceptable Hot-Mix Asphalt Test Parameters
    Hajj, Ramez ;
    Lu, Yujia
    2024-05-01 | PDF
    According to the current standard specifications and special provisions within the Illinois Department of Transportation, four quality assurance (QA) parameters are used to assess acceptability to remain in place for hot-mix asphalt (HMA) construction projects. However, when these parameters fall outside acceptable limits, it is not clear what impa ...
  • Enhancing and Generating GDOTs MUTCD Curve Sign Placement Design with Curve Finder and Curve Sign Determination
    Enhancing and Generating GDOT’s MUTCD Curve Sign Placement Design with Curve Finder and Curve Sign Determination
    Tsai, Yichang (James) ;
    Yang, Zhongyu
    2024-05-01 | PDF
    To meet MUTCD requirements for curve sign design, the Georgia Department of Transportation (GDOT) developed a MUTCD-compliant curve sign design practice that uses the Curve Advisory Reporting System (CARS) system developed by the Rieker company. However, processing the CARS data collected by GDOT using Rieker devices is labor-intensive, time-consum ...
  • Robust Wireless Skin Sensor Networks for LongTerm Fatigue Crack Monitoring of Bridges Phase I
    Robust Wireless Skin Sensor Networks for Long-Term Fatigue Crack Monitoring of Bridges (Phase I)
    Laflamme, Simon ;
    Liu, Han
    2024-05-01 | PDF
    In this project, we extended research and development of a novel sensing technology previously investigated in the pooled fund initiative TPF-5(328). The technology is a soft elastomeric capacitor (SEC) developed at Iowa State University. It is a geometrically large strain gauge, and its measurement principle is based on transducing changes in stra ...
  • Identification of a Response and Rescue Network for the St Louis Region
    Identification of a Response and Rescue Network for the St. Louis Region
    Edara, Praveen ;
    Chang, Dae Yeol
    2024-05-01 | PDF
    Emergency preparedness and response are crucial for mitigating the impact of natural disasters such as earthquakes. The St. Louis metropolitan region is vulnerable to earthquakes in the New Madrid and Wabash Valley Seismic Zones. This study focuses on understanding and addressing transportation impacts of an earthquake in the St. Louis region. An o ...
  • Leveraging Abandoned Railroad Tunnels for Bat Conservation
    Leveraging Abandoned Railroad Tunnels for Bat Conservation
    Johnson, Joseph S ;
    Kuchta, Shawn R
    2024-05-01 | PDF
    This report summarizes a study on abandoned tunnels' importance to bat populations in Ohio. We located 50 tunnels and surveyed 40 of these for one or more winter season. Little brown myotis, big brown bats, and tricolored bats were the most commonly observed species, with varying preferences for tunnel features. Key predictors of bat use such as tu ...
  • Benefit Analysis of Barrier Inlet Screens Fact Sheet
    Benefit Analysis of Barrier Inlet Screens [Fact Sheet]
    Kerns, Justin ;
    Winston, Ryan J
    2024-05-01 | PDF
    A wide range of debris from fine sediments to hubcaps and tires can enter ODOT roadside drainage inlets, disrupting the hydraulic capacity of sewer systems. This often leads to increased stormwater spread and ponding on roadways – a danger to motorists. Barrier inlets are particularly vulnerable to these issues given their minimal separation from t ...
  • Experiences With Autonomous Vehicle in US Cities
    Experiences With Autonomous Vehicle in U.S. Cities
    D’Agostino, Mollie Cohen ;
    Cooper, Elliott Michael
    2024-05-01 | PDF
    This project convened a series of meetings and workshops to prioritize listening to multi-sector stakeholders from local government, advocacy, and industry in US cities where autonomous vehicles are operating. The objective was to listen and learn from all stakeholders, raise issues surrounding accessibility and equity, and to solicit responses. Ke ...
  • Evaluation of Ramp Metering Effectiveness Along the I35 Corridor in the Kansas City Metropolitan Area Technical Summary
    Evaluation of Ramp Metering Effectiveness Along the I-35 Corridor in the Kansas City Metropolitan Area [Technical Summary]
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2024-05-01 | PDF
    This research investigated the safety and operational benefits of ramp metering along the I-35 corridor in the Kansas City metropolitan area. A before-and-after study was conducted to compare selected performance measures, with a “before” period from August 2015 to December 2015 and an “after” period from October 2021 to February 2022. The research ...
  • Implementation and Monitoring of a NonProprietary UltraHigh Performance Concrete Bridge Deck Overlay
    Implementation and Monitoring of a Non-Proprietary Ultra-High Performance Concrete Bridge Deck Overlay
    Alvarez, Andres ;
    Weldon, Brad D.
    2024-05-01 | PDF
    Concrete bridge decks frequently experience deterioration caused by heavy traffic loads and harsh environmental conditions. New and more effective methods of repair are required to ensure that concrete bridge decks continue to perform adequately. Bridge deck overlays are a popular deck repair strategy as they increase cover for the deck reinforcing ...
  • Statewide Screening of Signalized Intersections for Capacity Improvements
    Statewide Screening of Signalized Intersections for Capacity Improvements
    Gayen, Saumabha ;
    Saldivar-Carranza, Enrique Daniel
    2024-05-01 | PDF
    Identification of congested traffic signals that require capital investment to increase capacity has historically been a time-consuming process. Signalized intersections with congestion were analyzed to see if they could be improved through retiming, and capital investment was only considered if retiming is deemed infeasible. Automated Traffic Sign ...
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