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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 1041 - 1060 of 36104 results
  • 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 ...
  • Traffic Safety Facts 2022 Data Older Population
    Traffic Safety Facts 2022 Data: Older Population
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-08-01 | PDF
    In 2022 there were 7,971 people 65 and older killed and an estimated 268,622 injured in motor vehicle traffic crashes. Older people made up 19 percent of all traffic fatalities and 11 percent of all people injured in 2022. Compared to 2021 there was a 6-percent increase in the number of traffic fatalities and a 1-percent increase in the estimated n ...
  • Traffic Safety Facts CrashStats Seat Belt Use in 2023 Use Rates in the States and Territories
    Traffic Safety Facts Crash-Stats: Seat Belt Use in 2023 ─ Use Rates in the States and Territories
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-08-01 | PDF
    In 2023 seat belt use in the United States ranged from 68.2 percent in the U.S. Virgin Islands to 98.4 percent in Hawaii. Twenty-seven States, the District of Columbia, Guam, Puerto Rico, and the Northern Mariana Islands achieved seat belt use rates of 90 percent or higher. These results are from probability-based observational surveys conducted by ...
  • 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.
  • Jaunt Rural Transit Needs Assessment
    Jaunt Rural Transit Needs Assessment
    Mattson, Jeremy ;
    Hough, Jill
    2024-08-01 | PDF
    This study examines rural transit needs for Jaunt. The objective is to quantify the need for transit services in each of Jaunt’s partner jurisdictions. Jaunt provides transit in the city of Charlottesville, Virginia, and the counties of Albemarle, Buckingham, Fluvanna, Greene, Louisa, and Nelson. Neighboring Goochland County is also included in the ...
  • Improve Data Quality for Automated Pavement Distress Data Collection
    Improve Data Quality for Automated Pavement Distress Data Collection
    Wang, Feng ;
    Luo, Xiaohua
    2024-08-01 | PDF
    Since Fiscal Year 2017, the Texas Department of Transportation (TxDOT) has employed advanced automated and semi-automated techniques using 3D laser technology and high-resolution cameras to collect pavement condition data over 197,000 lane miles. Although this approach marks a significant technological advancement, concerns about the accuracy and p ...
  • Redesign of Innovative Gate Arms Ramp Closure Gate Phase I Research Project Capsule 242ST
    Redesign of Innovative Gate Arms (Ramp Closure Gate) – Phase I: Research Project Capsule [24–2ST]
    Cakalli, Sofokli ;
    Codjoe, Julius
    2024-08-01 | PDF
    This project aims to redesign the existing ramp closure gate used by Louisiana DOTD. The research team will utilize FE computer simulations and laboratory crash testing to develop a modified design that both passes MASH test protocols consistently and meets the functional requirements.
  • OSTR Research Roundup Newsletter August 2024
    OST-R Research Roundup Newsletter: August 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-08-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Multimodal Airport Charging Station Deployment Phase I
    Multimodal Airport Charging Station Deployment – Phase I
    Trendowski, John ;
    Jost, Kelly
    2024-08-01 | PDF
    The Multimodal Airport Charging Station Deployment – Phase I research addressed the following principal objectives: Conduct a feasibility analysis for a multimodal charging station at a Michigan Airport, and provide recommendations on design and implementation of multimodal charging stations. The research team reviewed previous reports, evaluated a ...
  • Assessing the Suitability of NonRegulatory Sensors for Particulate Matter Measurements in Transportation Applications
    Assessing the Suitability of Non-Regulatory Sensors for Particulate Matter Measurements in Transportation Applications
    Kolesar, Katheryn R
    2024-08-01 | PDF
    In 2020, the Colorado Department of Transportation (CDOT), in collaboration with the Colorado Department of Public Health & Environment (CDPHE) Air Pollution Control Division (APCD), began monitoring along a section of Interstate (I) 270 that is slated for roadway construction. Specifically, five types of non-regulatory supplemental and information ...
  • Developing Data Sources and Standards for Supporting Arterial TSMO Implementation of the Statewide Arterial Management Program STAMP
    Developing Data Sources and Standards for Supporting Arterial TSM&O Implementation of the Statewide Arterial Management Program (STAMP)
    Abdel-Aty, Mohamed ;
    Barbour, Natalia
    2024-08-01 | PDF
    The current research project aimed to evaluate the necessary elements for creating a data management platform for the FDOT districts. To achieve the project objectives, a statewide survey was developed and disseminated to each district in Florida and the findings were used to summarize best practices and areas of opportunity. The literature review ...
  • Laboratory Information Materials Management System LIMMS Development Planning
    Laboratory Information Materials Management System (LIMMS) Development Planning
    Tessier, Russell
    2024-07-31 | PDF
    The purpose of this project was to conduct a gap analysis that examined the needs of LIMMS users from system design and functionality to security. The analysis took into consideration the multiple platforms used by MassDOT currently for material and contract management. During the project, feedback was obtained from MassDOT users via private meetin ...
  • Steel Bridge Coating and Recoating Warranty Requirements
    Steel Bridge Coating and Recoating Warranty Requirements
    Padilla, Felix ;
    Ault, Pete
    2024-07-30 | PDF
    The service life of steel bridge coatings in Florida is occasionally shorter than the intended design life, resulting in the need for increased maintenance painting. This project examined the value of warranty terms potentially included in painting contracts to improve the quality and durability of steel bridge coatings. The research found that the ...
  • Investigation Crash Testing and Evaluation of a MASH TL4 Precast Concrete Bridge Rail
    Investigation, Crash Testing, and Evaluation of a MASH TL-4 Precast Concrete Bridge Rail
    Faller, Ronald K. ;
    Bielenberg, Robert W.
    2024-07-26 | PDF
    Recently, a precast concrete bridge barrier with unique connection details for barrier-to-deck and barrier-to-barrier interfaces was developed at the Institute of Transportation (InTrans)-Iowa State University (ISU) for ABC applications. Successful laboratory quasi-static tests led to the current study, in which the primary objectives were to deter ...
  • Artificial Intelligence AI and Markov Process Based Data Mining on Predicting Bridge Operating Conditions
    Artificial Intelligence (AI) and Markov Process Based Data Mining on Predicting Bridge Operating Conditions
    Fang, F Clara ;
    JimenezGil, Daniel
    2024-07-22 | PDF
    To facilitate bridge management decision-making and implement preventive maintenance strategies, we endeavor to develop a machine learning model to predict the future condition rating of bridges using historical inspection data, with a funding contract with Connecticut State’s Department of Transportation. We collect the data from the USA's Nationa ...
  • Chemical Subgrade Stabilization of Tennessee Soils Recommended Practices
    Chemical Subgrade Stabilization of Tennessee Soils – Recommended Practices
    VandenBerge, Daniel R ;
    Mohr, Benjamin J
    2024-07-15 | PDF
    This report summarizes the state-of-practice in the evaluation, design, and implementation of chemical subgrade stabilization. Four Tennessee soils (two A-6 and two A-7-6) were obtained and mix designs were prepared to provide examples of the testing required for chemical stabilization. The stabilized soils met the design unconfined strength criter ...
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