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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 1541 - 1560 of 36873 results
  • Intermediate Bents Calculation of Restraint Factor
    Intermediate Bents— Calculation of Restraint Factor
    Orton, Sarah ;
    Elsisi, Alaaeldin
    2024-06-01 | PDF
    This report investigates the restraint at the top of the column of non-integral intermediate bents with closed diaphragms, a common connection configuration utilized by the MoDOT. Although closed diaphragms inherently possess some level of rotational restraint, the current design approach considers this type of connection as free, resulting in the ...
  • NJDOT Complete Streets Assessment Brief
    NJDOT Complete Streets Assessment [Brief]
    Hopwood, Cory
    2024-06-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics to research Complete Streets best practices and assess New Jersey’s existing Complete Streets activities. The Complete Streets concept is comprised of approaches to planning, designing, and operating roadways and rights-of-way with all road users in mind, making the t ...
  • Toward the Development of PavementSpecific Structural Synthetic Fibers
    Toward the Development of Pavement-Specific Structural Synthetic Fibers
    Barman, Manik ;
    Sabu, Rohith
    2024-06-01 | PDF
    Thin fiber reinforced concrete (FRC) pavements and overlays can be economical for low- and moderate-traffic volume roads. Due to insufficient concrete cover thickness, thin concrete pavements or overlays cannot accommodate dowel bars that are typically used in conventional thick concrete pavements. The critical distress for such applications is the ...
  • Evaluating Arkansas Weathering Steel Bridge Performance
    Evaluating Arkansas Weathering Steel Bridge Performance
    Gonzalez, Yessenia ;
    Heymsfield, Ernie.
    2024-06-01 | PDF
    Weathering steel enhances corrosion-resistant steel features over conventional steel when a patina properly forms on the weathering steel surface. Weathering steel is a low-carbon steel of less than 0.3 percent carbon by weight. The steel material’s chemical composition includes other alloying elements such as nickel, copper, and chromium. These co ...
  • Trip Generation Study FastFood with DriveThrough Coffee Shops with DriveThrough
    Trip Generation Study Fast-Food with Drive-Through & Coffee Shops with Drive-Through
    Roark, Drew ;
    Oliver, Bill
    2024-06-01 | PDF
    A traffic impact study may be required for proposed development projects that generate significant vehicular traffic as a result of the development. The purpose of the Traffic Impact Analysis (TIA) is to identify the adequacy of the existing transportation infrastructure to accommodate any changes in trips generated by a proposed development/redeve ...
  • Evaluation of Remediation Strategies for ShrinkSwell Clays in Western Alabama
    Evaluation of Remediation Strategies for Shrink-Swell Clays in Western Alabama
    Anderson, J. Brian ;
    Jackson, Dan T
    2024-06-01 | PDF
    Alabama Highway 5 is a farm-to-market road built over an expansive clay subgrade. Moisture fluctuations cause the soil to shrink and swell, resulting in severe pavement distress. The purpose of this study was to recommend and evaluate remediation strategies that can be implemented on AL 5 and other similar roadways that are affected by swelling cla ...
  • Thickness Design for CementTreated Base Pavements
    Thickness Design for Cement-Treated Base Pavements
    Thompson, Marshall
    2024-06-01 | PDF
    This project developed a cement-treated base (CTB) thickness design procedure for the Illinois Department of Transportation based on CTB fatigue (stress ratio criterion). The researcher developed a comprehensive ILLI-PAVE database for a range of thickness design inputs (7-day compressive strength, CTB thickness, and subgrade modulus). A CTB flexura ...
  • Development of a Research Roadmap for ITDs Bridge Section
    Development of a Research Roadmap for ITD’s Bridge Section
    Taylor, Dustin ;
    Ebrahimpour, Arya
    2024-06-01 | PDF
    The Idaho Transportation Department (ITD) Bridge Section has been at the forefront of advancing bridge materials, design, construction, preservation, and inspection in Idaho through sponsored research. However, the department acknowledges the necessity of evolving from past ad hoc research requests to a more proactive and systematic approach. The a ...
  • Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality
    Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality
    Zhai, Huachun ;
    Russell, Erin
    2024-06-01 | PDF
    The Idaho Degradation Test was modified to standardize the procedure and improve the repeatability of the test. An evaluation of the temperature and time needed for sample preparation was conducted to accelerate the test process. Based on a national survey conducted by the research group, the Durability Index and the Micro-Deval abrasion loss tests ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
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