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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 1401 - 1420 of 36873 results
  • 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 ...
  • 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 ...
  • Traffic Safety Facts 20132022 Data SchoolTransportationRelated Traffic Crashes
    Traffic Safety Facts 2013-2022 Data: School-Transportation-Related Traffic Crashes
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-08-01 | Traffic Safety Facts | PDF
    From 2013 to 2022 there were 976 fatal school-transportation-related traffic crashes, and 1,082 people of all ages were killed in those crashes-an average of 108 fatalities per year. A school-transportation-related motor vehicle traffic crash directly or indirectly involves a school transportation vehicle that is either a school bus body type or a ...
  • Maine Smart Chloride System
    Maine Smart Chloride System
    Ballestero, Thomas P. ;
    Macadam, Daniel
    2024-08-01 | PDF
    A June 2023–June 2024 study of a Smart Chloride System, intended to manage road salt runoff at Maine DOT sites, failed to meet EPA standards and increased chloride concentrations, worsening water quality. Findings suggest that retaining and slowly releasing salt is ineffective, and that a dilution strategy, while potentially viable at some sites, i ...
  • Snow Plow Performance Measures in NonRWIS Locations
    Snow Plow Performance Measures in Non-RWIS Locations
    Jiang, Gang ;
    Kuang, Biao
    2024-08-01 | PDF
    This project aims to enhance traffic safety by developing an Artificial Intelligence (AI) model and the weather interpolation method to evaluate snow cover conditions on road surfaces using existing roadside Closed-Circuit Television system (CCTV) images in non-Road Weather Information System (RWIS) locations. Snow- cover significantly impacts traf ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Develop Guidebook for Managing System Costs Operational and Capital Cost Management at Rural and Small Urban Public Transit Systems Project Summary Report
    Develop Guidebook for Managing System Costs: Operational and Capital Cost Management at Rural and Small Urban Public Transit Systems [Project Summary Report]
    Walk, Michael J. ;
    Edrington, Suzie
    2024-07-31 | PDF
    This research performed the following activities:• Conducted a needs assessment of Texas rural and small urban public transit systems to better understand their cost management needs, what cost management topics are most critical, and what format of training materials would be the most helpful to rural and small urban transit managers.• Conducted a ...
  • 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 ...
  • OffSystem Public Roads Annual Average Daily Traffic AADT Estimation and Validation Tools Literature Review and Research Report
    Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report
    Egge, Mark ;
    Miller, Bryce C.
    2024-07-24 | PDF
    This report describes a process for estimating AADT on non-Federal-Aid public roads (collectively called “off-system” roads) in Idaho. This will provide additional data for ITD and regional and local transportation agencies to conduct analysis, and it will meet new federal requirements for estimating AADT on all public roads. The report includes a ...
  • 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 ...
  • Design and Operational Assessment of a Railroad Track Robot for Railcar Undercarriage Condition Inspection Article
    Design and Operational Assessment of a Railroad Track Robot for Railcar Undercarriage Condition Inspection [Article]
    Ahmadian, Mehdi ;
    Kasch, James M
    2024-07-10 | PDF
    This research assesses the design and track operation of a track crawler robot (TCR) for practical and easy inspection of stationary railcars’ undercarriages in an effort to detect any pending failures or assess any security risk of out-of-sight objects. The TCR includes a drive system consisting of two AC motors that operate a track (like tank tra ...
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