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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 741 - 760 of 35448 results
  • Economic Impact of Access Management Treatments
    Economic Impact of Access Management Treatments
    Barnes, Stephen ;
    Schneider, Helmut
    2024-08-01 | PDF
    Access management is a form of traffic engineering utilized by transportation agencies to improve the safety and efficiency of traffic flow on, off, and between roadways. Access management applies a variety of construction interventions that manipulate how vehicles enter and exit roadways and access the driveways or parking lots of homes and busine ...
  • Implementing the LWD for MoDOT Construction Acceptance of Unbound Material Layers Phase II Research Summary
    Implementing the LWD for MoDOT Construction Acceptance of Unbound Material Layers: Phase II [Research Summary]
    Zhang, Xiong
    2024-08-01 | PDF
    This Phase II project aimed to accumulate more field test data to improve the standards for the implementation of the Zorn lightweight deflectometer (LWD) for the acceptance of unbound materials layers. Five more different soils, including New Florence CL (lean clay), Holts Summit GM (silty gravel), Sikeston SM (silty sand), Rolla CL (lean clay), a ...
  • TimetoFailure Prediction of FineGrained Soil Slopes Subject to WeatherDriven Deterioration Research Brief
    Time-to-Failure Prediction of Fine-Grained Soil Slopes Subject to Weather-Driven Deterioration [Research Brief]
    Morsy, Amr M
    2024-08-01 | PDF
    This study aimed to forecast the time to failure of aging, deteriorating clay embankments supporting transportation infrastructure. This study utilized the user-defined subroutines that were developed and implemented by Morsy et al. to allow transient calculations of coupled hydromechanical behavior.
  • Analysis of Asphalt Mixtures Using Alternative Aggregate in SMA and Superpave Research Summary
    Analysis of Asphalt Mixtures Using Alternative Aggregate in SMA and Superpave [Research Summary]
    Liu, Jenny
    2024-08-01 | PDF
    Currently, most state highway agencies (SHAs), including Missouri Department of Transportation (MoDOT), require specific aggregates for Stone Matrix Asphalt (SMA) and high-level Hot Mix Asphalt (HMA) mixtures. Meanwhile, to reduce the cost and maintain mixtures’ durability, SHAs have been trying to identify locally available, cost-effective, and du ...
  • Mitigating and Preventing MoDOT SafetyRelated Incidents Through RootCause Elimination and Utilization of Leading Safety Indicators
    Mitigating and Preventing MoDOT Safety-Related Incidents Through Root-Cause Elimination and Utilization of Leading Safety Indicators
    Chammout, Bahaa ;
    El-adaway, Islam
    2024-08-01 | PDF
    This report thoroughly investigates and analyzes the diverse factors influencing incident occurrence in work zone environments, aiming to identify areas where proactive planning can enhance incident mitigation. Drawing from an extensive review of existing literature on work zone safety, 37 factors affecting both public and occupational safety were ...
  • Mitigating and Preventing MoDOT SafetyRelated Incidents Through RootCause Elimination and Utilization of Leading Safety Indicators Research Brief
    Mitigating and Preventing MoDOT Safety-Related Incidents Through Root-Cause Elimination and Utilization of Leading Safety Indicators [Research Brief]
    El-adaway, Islam
    2024-08-01 | PDF
    This report thoroughly investigates and analyzes the diverse factors influencing incident occurrence in work zone environments, aiming to identify areas where proactive planning can enhance incident mitigation. Drawing from an extensive review of existing literature on work zone safety, 37 factors affecting both public and occupational safety were ...
  • Identification of Simulation Calibration Parameters Using Urban Freeway Data
    Identification of Simulation Calibration Parameters Using Urban Freeway Data
    Golias, Mihalis M. ;
    Mishra, Sabyasachee
    2024-08-01 | PDF
    The reliability of a microsimulation model such as VISSIM depends on proper calibration and validation to accurately represent real-world traffic conditions. However, the VISSIM default values do not apply to local traffic conditions and need to be calibrated for local traffic conditions considering the higher number of car-following parameters. He ...
  • Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities MP4
    Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities [MP4]
    Purdue University. Joint Transportation Research Program
    2024-08-01 | AVI
    Purdue Probe Diagram Video
  • InService Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments
    In-Service Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments
    Pineda-Mendez, Raul A ;
    Guo, Qiming
    2024-08-01 | PDF
    Crashes related to barrier end treatments and impact attenuators generally have higher severity levels than those colliding with barrier faces. To select the most effective end treatments, the in-service safety evaluation of such end treatments under various operational conditions was needed. This study linked 7 years of crash records with the corr ...
  • InService Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments Summary
    In-Service Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments [Summary]
    Tarko, Andrew P. ;
    Romero, Mario A.
    2024-08-01 | PDF
    Crashes related to barrier end treatments and impact attenuators generally have higher severity levels than those colliding with barrier faces. To select the most effective end treatments, the in-service safety evaluation of such end treatments under various operational conditions was needed. This study linked 7 years of crash records with the corr ...
  • Use of Machine Learning Methods to Obtain a Reliable Predictive Model for Resilient Modulus of Subgrade Soil
    Use of Machine Learning Methods to Obtain a Reliable Predictive Model for Resilient Modulus of Subgrade Soil
    Khoshnevisan, Sara ;
    Norouzi, Mehdi
    2024-08-01 | PDF
    This project explores the development and optimization of predictive models for the resilient modulus (MR) of subgrade soil using advanced machine learning techniques. Comprehensive data from INDOT spanning several years was analyzed to enhance the accuracy of MR predictions. The study not only refined the modeling approach through statistical meth ...
  • Implementation of Understanding the Impact of Autonomous Vehicles on LongDistance Travel Mode and Destination Choice in Texas
    Implementation of Understanding the Impact of Autonomous Vehicles on Long-Distance Travel Mode and Destination Choice in Texas
    Kockelman, Kara ;
    Vellimana, Maithreyi
    2024-08-01 | PDF
    Privately owned and shared autonomous vehicles (AVs and SAVs) and automated trucks (ATrucks) are coming to the US and Texas. This project updated TxDOT’s Statewide Analysis Model (SAM) to integrate AVs, SAVs, and ATrucks as added transportation modes. For passenger trips over 50 miles (one way), the nested logit model was modified to include househ ...
  • Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities
    Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities
    Saldivar-Carranza, Enrique Daniel ;
    Platte, Tom
    2024-08-01 | PDF
    The Indiana Department of Transportation (INDOT) manages over 2,000 traffic signals in the State. It is unfeasible to identify systemwide improvement opportunities by evaluating the performance of thousands of traffic signals on monitoring dashboards. This report describes how a scalable technique based on connected vehicle (CV) trajectory data sys ...
  • Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities Summary
    Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities [Summary]
    Bullock, Darcy M.
    ORCID ICON IMG
    2024-08-01 | PDF
    The Indiana Department of Transportation (INDOT) manages over 2,000 traffic signals in the State. It is unfeasible to identify systemwide improvement opportunities by evaluating the performance of thousands of traffic signals on monitoring dashboards. This report describes how a scalable technique based on connected vehicle (CV) trajectory data sys ...
  • Accelerated Bridge Construction ABC Decision Tool Final Report
    Accelerated Bridge Construction (ABC) Decision Tool: Final Report
    Barutha, Phil ;
    Maguire, Marc
    2024-08-01 | PDF
    This report investigates the creation and assessment of a decision-making tool developed to aid the Nebraska Department of Transportation (NDOT) in determining the suitability of the Accelerated Bridge Construction (ABC) method for bridge replacement projects. The tool utilizes the Analytic Hierarchy Process (AHP) to integrate different criteria, i ...
  • Electric Vehicles Public Perceptions Expectations and WillingnesstoPay
    Electric Vehicles: Public Perceptions, Expectations, and Willingness-to-Pay
    Moras, Bruno Cesar Krause ;
    Chen, Xiaowei
    2024-08-01 | PDF
    The primary objective of this project was to understand Indiana resident’s perspectives on electric vehicles (EVs), including adoption incentives and barriers, awareness of adoption incentives, charging preferences, and general travel patterns. A secondary objective was to establish a framework for identifying EV users, detailing their trips, and g ...
  • Electric Vehicles Public Perceptions Expectations and WillingnesstoPay Summary
    Electric Vehicles: Public Perceptions, Expectations, and Willingness-to-Pay [Summary]
    Gkritza, Konstantina ;
    Ukkusuri, Satish
    2024-08-01 | PDF
    The primary objective of this project was to understand Indiana resident’s perspectives on electric vehicles (EVs), including adoption incentives and barriers, awareness of adoption incentives, charging preferences, and general travel patterns. A secondary objective was to establish a framework for identifying EV users, detailing their trips, and g ...
  • Energy and Emissions Impacts of Atlantas Reversible Express Toll Lanes and HighOccupancy Toll Lanes
    Energy and Emissions Impacts of Atlanta’s Reversible Express Toll Lanes and High-Occupancy Toll Lanes
    Lu, Hongyu ;
    Liu, Haobing
    2024-08-01 | PDF
    This report summarizes the impact on corridor-level energy use and emissions associated with the 2018 opening of the I-75 Northwest Corridor (NWC) and I-85 Express Lanes in Atlanta, GA. The research team tracked changes in vehicle throughput on the managed lane corridors (extracted from GDOT’s Georgia NaviGAtor machine vision system after comprehen ...
  • Leveraging LiDAR Intensity to Evaluate Roadway Pavement Marking Retroreflectivity
    Leveraging LiDAR Intensity to Evaluate Roadway Pavement Marking Retroreflectivity
    Brinster, Gregory L ;
    Hodaei, Mona
    2024-08-01 | PDF
    Clearly visible lane markings are important for all road users, particularly autonomous vehicles. In general, nighttime retroreflectivity is one of the most challenging marking visibility characteristics for agencies to monitor and maintain, particularly in cold weather climates when agency snowplows remove retroreflective material during winter op ...
  • Accessible Bus Stop Design in the Presence of Bike Lanes
    Accessible Bus Stop Design in the Presence of Bike Lanes
    Christofa, Eleni ;
    Ai, Chengbo
    2024-08-01 | PDF
    Floating bus stops are used to facilitate transit operations and enhance accessibility by allowing in-lane stops. A bike channel separates the platform from the sidewalk, preventing conflicts between buses and bicycles but potentially causing conflicts between bicyclists and bus riders. The objectives of this research are to: 1) investigate bus rid ...
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