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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 2281 - 2300 of 35888 results
  • Enhancing Pedestrian Experiences at Roundabouts Technical Summary
    Enhancing Pedestrian Experiences at Roundabouts [Technical Summary]
    Gustafson, Joe ;
    Godavarthy, Ranjit
    2022-12-01 | PDF
    The goal of this project was to understand pedestrian issues with roundabouts, identify strategies to enhance the pedestrian experience and develop guidance for local agencies creating new roundabouts and evaluating existing ones. Researchers reviewed past studies and strategies to control pedestrian crossings in roundabouts and the most cost-effec ...
  • Crashes Related to Type and Location of Driveway Access
    Crashes Related to Type and Location of Driveway Access
    Williams, Kristine M ;
    Chen, Cong
    2022-12-01 | PDF
    This study examines how commercial driveway access location and design interact with roadway and interchange characteristics to influence vehicular, bicycle, and pedestrian safety. The final sample for analysis included: a) 192 roadway segments with 9,889 commercial driveways and 10,596 driveway-related crashes; and b) 69 interchanges with 832 comm ...
  • DataDriven Bridge Management Using Descriptive and Predictive Machine Learning Models
    Data-Driven Bridge Management Using Descriptive and Predictive Machine Learning Models
    Banaei-Kashani, Farnoush ;
    Arens, Kevin
    2022-12-01 | PDF
    Bridges deteriorate with time and use. To monitor deterioration of the bridges, several US Acts mandate the state and local governmental agencies (including cities, state transportation agencies, etc.) to perform regular bridge inspections. The aforementioned inspections across the nation, which have been conducted since 1970’s (including our regio ...
  • Performance Evaluation of Connected Vehicle CV and Transportation Systems Management and Operations TSMO Projects in Florida Summary
    Performance Evaluation of Connected Vehicle (CV) and Transportation Systems Management and Operations (TSM&O) Projects in Florida [Summary]
    Ponnaluri, Raj ;
    Alluri, Priyanka
    2022-12-01 | PDF
    Technology that connects human experience with artificial intelligence is increasingly reaching every sector of society – including Florida’s transportation network. To stay ahead of this curve, the Florida Department of Transportation (FDOT) currently has 33 deployed projects that explore this interconnectivity through Connected Vehicle (CV) techn ...
  • Expanded Use of AVLGPS Technology Final Report
    Expanded Use of AVL/GPS Technology: Final Report
    Lee, Ming-Shiun ;
    Nelson, Dan
    2022-12-01 | PDF
    Summer road maintenance is a critical activity for highway maintenance agencies that involves a wide range of maintenance and construction vehicles that can be active at any given time, which makes vehicle and maintenance asset management challenges. Automated Vehicle Location (AVL) and Global Positioning Systems (GPS) technologies installed in win ...
  • Research Development and Technology Strategic Plan 20222026
    Research, Development and Technology Strategic Plan 2022–2026
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2022-12-01 | PDF
    This U.S. DOT Research, Development, and Technology Strategic Plan for FY2022 – 2026 establishes the Department’s leadership role in supporting, fostering, and safeguarding transportation innovation so that it meets our goals and reflects our values. The RD&T Strategic Plan describes the Department’s research priorities, objectives, and strategies ...
  • Success of a 4Year Pavement Management Plan
    Success of a 4-Year Pavement Management Plan
    Gurganus, Charles ;
    Goehl, Darlene
    2022-12-01 | PDF
    Successful 4-year pavement management plans help provide the traveling public with a safe, comfortable, and reliable roadway network. Each maintenance section plays a role in executing an effective 4-year pavement management plan. To continue to improve the statewide system and get the most value out of fiscally constrained budgets, pavement manage ...
  • Guidelines for Activating Ramp Meters During OffPeak Hours and Weekends Summary
    Guidelines for Activating Ramp Meters During Off-Peak Hours and Weekends [Summary]
    Motta, Alejandro ;
    Alluri, Priyanka
    2022-12-01 | PDF
    This research sought to develop specific guidelines for activating RMSs during non-recurring congestion.
  • Application of MechanisticEmpirical Design Approach into RCC Pavement Thickness Design Tech Summary 191P
    Application of Mechanistic-Empirical Design Approach into RCC Pavement Thickness Design: Tech Summary [19-1P]
    Wu, Zhong ;
    Mahdi, Moinul
    2022-12-01 | PDF
    The objectives of this research included: • Determine in-situ load-induced and temperature-related pavement responses, investigate pavement failure mechanism and structural performance, and quantify the equivalent axle load fatigue damages on RCC pavements under accelerated pavement testing; • Conduct laboratory beam fatigue tests using in-situ saw ...
  • FargoMoorhead Regional ITS Architecture Update Version 40
    Fargo-Moorhead Regional ITS Architecture Update: Version 4.0
    Hasan, MD Sharijad
    2022-12-01 | PDF
    The Fargo-Moorhead (F-M) Regional Intelligent Transportation Systems (ITS) Architecture Update was prepared under the F-M Metropolitan Council of Governments (Metro COG) leadership. The architecture was first developed in 2005, and since then, it has been updated three times in 2007, 2014, and 2022. The F-M regional architecture (RA) aims to guide ...
  • Approaches for Assessing Flows, Concentrations, and Loads of Highway and Urban Runoff and Receiving-Stream Stormwater in Southern New England With the Stochastic Empirical Loading and Dilution Model (SELDM) [supporting dataset]
    Granato, Gregory E. ;
    Spaetzel, Alana B
    2022-11-30 | ZIP
    The Stochastic Empirical Loading and Dilution Model (SELDM) was designed to help quantify the risk of adverse effects of runoff on receiving waters, the potential need for mitigation measures, and the potential effectiveness of such management measures for reducing these risks. SELDM is calibrated using representative hydrological and water-quality ...
    Dataset Supporting Files
  • Maintenance and Performance Study of Porous Asphalt in Northern Climates at the Randolph Park Ride
    Maintenance and Performance Study of Porous Asphalt in Northern Climates at the Randolph Park & Ride
    Miller, Tanya
    2022-11-22 | PDF
    Previous studies were conducted at the Randolph Park and Ride regarding the implementation and performance of porous concrete (PC) in northern climates. The studies examined field surface infiltration capacity, the effects of plowing on surface infiltration capacity and the PC implementation. The study concluded that PC surface infiltration was ade ...
  • Evaluation of Stripping Potential Tests for Bituminous Concrete
    Evaluation of Stripping Potential Tests for Bituminous Concrete
    KC, Bijay ;
    Khorasani, Ali
    2022-11-08 | PDF
    Pavement stripping due to loss in adhesion/binding between asphalt binder and aggregate in presence of moisture is a common and challenging pavement distress in wet climates such as Vermont. Although Vermont Agency of Transportation (VTrans) requires Hamburg Wheel Tracking Test (AASHTO T 324) during mix design approval, MRD-10 is required daily if ...
  • Quantifying Correlations Between Pavement Conditions and Snow and Ice Control Costs and Recalculating 20212022 Winter Performance Measures
    Quantifying Correlations Between Pavement Conditions and Snow and Ice Control Costs and Recalculating 2021-2022 Winter Performance Measures
    Sullivan, James L. ;
    Robinson, Mitchell
    2022-11-02 | PDF
    This project consisted of an analysis of the relationship between pavement quality and winter maintenance cost, and calculation of selected winter maintenance performance measures for the last 11 winter seasons. The project included obtaining the necessary data, gathering it into a GIS, and analyzing the relationship between pavement quality and wi ...
  • Evaluation of the Use of IRI Data to Estimate Bridge Dynamic Impact Factor DIF
    Evaluation of the Use of IRI Data to Estimate Bridge Dynamic Impact Factor (DIF)
    Liu, Zhengyu ;
    Phares, Brent M.
    2022-11-01 | PDF
    The objectives of this project were to correlate international roughness index (IRI) data (which are widely collected and directly related to bridge deck roughness) to impact factors and develop a process for determining the impact factor to use for all bridges in Iowa. To achieve the project objectives, a sample of 20 bridges was selected for brid ...
  • NJ Transit Grade Crossing Safety
    NJ Transit Grade Crossing Safety
    Zaman, Asim ;
    Alfaris, Ruqaya Emad
    2022-11-01 | PDF
    Grade crossings pose one of the most significant safety challenges for railroads and transit agencies across the United States (U.S.) and encompass 34% of railroad incidents in the past ten years. The elimination of grade crossings to reduce risk can improve public safety, decrease financial burdens, and improve service to the public. To improve gr ...
  • Assessment of Motorcycle Safety in Wyoming Fatal and Severe Crashes Contributing Factors and Potential Countermeasures
    Assessment of Motorcycle Safety in Wyoming: Fatal and Severe Crashes, Contributing Factors and Potential Countermeasures
    Zlatkovic, Milan ;
    Baah, Isaac
    2022-11-01 | PDF
    Motorcycle riders and passengers are much more likely to be killed or severely injured in a crash, and on average about 15 percent of all traffic fatalities include motorcyclists. The study uses 12 years of motorcycle crash data (2008-2019) from Wyoming on crash, vehicle and person levels, and applies multinomial logistic and Bayesian regression mo ...
  • USFCUTR I4 FRAME Project Before Study Data Collection and Analysis of Safety and Mobility Conditions Prior to Implementation
    USF-CUTR I-4 FRAME Project “Before” Study: Data Collection and Analysis of Safety and Mobility Conditions Prior to Implementation
    Lin, Pei-Sung ;
    Concas, Sisinnio
    2022-11-01 | PDF
    The Florida Department of Transportation (FDOT) created the Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements (FRAME) project to address safety and mobility issues on I-4 between Tampa and Orlando. The I-4 FRAME project aims to deploy an advanced integrated corridor management system consisting of advanced next-generation technologie ...
  • A Feasibility Study for Establishing A Regional Road Track Pavement Testing Facility in Wyoming
    A Feasibility Study for Establishing A Regional Road Track Pavement Testing Facility in Wyoming
    Hafez, Marwan ;
    Fosu-saah, Benjamin
    2022-11-01 | PDF
    This report discusses the benefits of full-scale pavement testing and the use of Accelerated Pavement Testing (APT) to collect pavement performance data under actual experimental conditions. The report highlights the development and operation of road test tracks, such as the Minnesota Road Research Project (MnROAD) and the National Center for Aspha ...
  • ThickLift Paving with Tamper Bar Pavers
    Thick-Lift Paving with Tamper Bar Pavers
    Wilson, Bryan ;
    Saca, Moises
    2022-11-01 | PDF
    This research studied thick-lift asphalt concrete construction using a tamper bar paver. Tamper bar pavers were deployed on three paving projects to place asphalt layers ranging from 6 to 10 inches thick. On each project, test sections were constructed in one and two lifts, evaluating different lift thicknesses, paver screed settings, and rolling p ...
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