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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 921 - 940 of 35448 results
  • 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 ...
  • Development of the Nebraska Department of Transportation Winter Severity Index Phase II
    Development of the Nebraska Department of Transportation Winter Severity Index – Phase II
    Anderson, Mark R. ;
    Walker, Curtis L.
    2024-05-31 | PDF
    For the Nebraska Department of Transportation (NDOT), the Nebraska Winter Severity Index (NEWINS) provided an independent framework to calculate a winter season’s severity by categorizing individual winter storms. However, one of the greatest limitations of NEWINS is that it is not predictive. Thus, this study builds on the previously developed NEW ...
  • Reinventing Airport Land Use Planning in California A Strategy for Updating the California Airport Land Use Planning Handbook Recommendations for Update of California Airport Land Use Handbook
    Re-inventing Airport Land Use Planning in California: A Strategy for Updating the California Airport Land Use Planning Handbook — Recommendations for Update of California Airport Land Use Handbook
    Rakas, Jasenka ;
    Lindbergh, Sarah
    2024-05-31 | PDF
    This report is written in response to the State of California Department of Transportation (Caltrans), Division of Aeronautics, relating to the need to update the 2011 version of the California Airport Land Use Planning (ALUP) Handbook. The purpose of this technical report and its supplementary materials is to provide a robust scientific foundation ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Feasibility of Implementing Pedestrian Hybrid Beacon PHB Signals for Improving Safety and Mobility in Nevada
    Feasibility of Implementing Pedestrian Hybrid Beacon (PHB) Signals for Improving Safety and Mobility in Nevada
    Kimley-Horn and Associates, Inc.  ...
    2024-05-01 | PDF
    Pedestrian safety has been a major concern throughout the 140-year history of the automobile, resulting in the development of numerous safety treatment options for mid-block pedestrian crossings. These include several types of beacons and signals. Some of these devices use flashing yellow beacons to alert motorists to pedestrian presence, while oth ...
  • OSTR Research Roundup Newsletter May 2024
    OST-R Research Roundup Newsletter: May 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-05-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Optimization of Cement Modified Recycled Base CMRB Mixture Design
    Optimization of Cement Modified Recycled Base (CMRB) Mixture Design
    Rangaraju, Prasad ;
    Naser, Mohannad
    2024-05-01 | PDF
    SCDOT is focused on improving the design of Cement-Modified Recycled Base (CMRB) to enhance the long-term durability and performance of pavements. The current approach emphasizes using unconfined compressive strength (UCS) and other parameters such as optimum moisture content (OMC) and maximum dry density (MDD) along with treatment depth in designi ...
  • Does California HighSpeed Rail Promote Accessibility for Station Cities Case Study of Fresno and Merced Research Brief
    Does California High-Speed Rail Promote Accessibility for Station Cities?: Case Study of Fresno and Merced [Research Brief]
    Wang, Chih-Hao ;
    Chen, Na
    2024-05-01 | PDF
    High-speed rail (HSR) provides more frequent service, lower cost, easier station access, greater reliability, and increased safety, and therefore has been regarded as a more effective transportation mode as compared to aviation for distances of up to 425 miles/700 km. California is currently building a high-speed rail system (CHSR), which will run ...
  • Test Procedure for Rapid Mix Design of CementTreated Base
    Test Procedure for Rapid Mix Design of Cement-Treated Base
    Sebesta, Stephen ;
    Taylor, Ross
    2024-05-01 | PDF
    SCOPE: 1.1 Tex-120-E consists of three parts. 1.1.1 Part I determines the moisture-density curve of material treated with cement. 1.1.2 Part II determines the target cement content using the unconfined compressive strength of samples molded in accordance with Tex-113-E and cured for 7 days. 1.1.3 Part III develops a laboratory mixture design for ce ...
  • Transit Workforce Development Challenges and Mitigation Practices
    Transit Workforce Development Challenges and Mitigation Practices
    Godfrey, Jodi
    2024-05-01 | PDF
    The objective of this research is to summarize previously conducted research related to workforce development challenges in the transit industry, detailing major findings and subsequent recommendations based on the annotated bibliography of the current atmosphere and most successful ways to mitigate those challenges to attract and retain talent in ...
  • Identification of a Response and Rescue Network for the St Louis Region Research Summary
    Identification of a Response and Rescue Network for the St. Louis Region [Research Summary]
    University of Missouri--Columbia. Department of Civil and Environmental Engineering  ...
    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 ...
  • Pavement Rehabilitation Analysis A LifeCycle Cost and LongTerm Performance Comparison of Full Depth Reclamation and Overlays
    Pavement Rehabilitation Analysis: A Life-Cycle Cost and Long-Term Performance Comparison of Full Depth Reclamation and Overlays
    Torres-Machi, Cristina ;
    Evers, Elijah
    2024-05-01 | PDF
    To reduce the environmental impact of transportation, Departments of Transportation (DOTs) are incorporating cold recycling technologies such as Full-Depth Reclamation (FDR) in their rehabilitation strategies. One of the limitations hindering the deployment of FDR is the limited information available on the material properties of these mixtures and ...
  • Engineering Design Procedures and Standard Drawings for Highway Construction Sediment Basins
    Engineering Design Procedures and Standard Drawings for Highway Construction Sediment Basins
    Schwartz, John S ;
    Smith, Payton M.
    2024-05-01 | PDF
    Stormwater discharges from highway construction that disturb soil greater than five acres are permitted by the Tennessee Department of Environment and Conservation (TDEC) where runoff sediment must be controlled meeting General Permit (TNR100000) requirements including development and submittal of a Stormwater Pollution Prevention Plan (SWPPP). Wit ...
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