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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 941 - 960 of 35448 results
  • Traffic Safety Facts 2021 Data RuralUrban Comparison of Motor Vehicle Traffic Fatalities
    Traffic Safety Facts 2021 Data: Rural/Urban Comparison of Motor Vehicle Traffic Fatalities
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-05-01 | PDF
    Of the 42,939 motor vehicle traffic fatalities in 2021, there were 17,103 (40%) that occurred in rural areas, 25,598 (60%) in urban areas, and 238 (1%) in areas that were not reported as rural or urban. This fact sheet for 2021 compares rural and urban motor vehicle traffic fatalities, covering the following topics: crash characteristics; drivers; ...
  • Traffic Safety Facts 2022 Data Occupant Protection in Passenger Vehicles
    Traffic Safety Facts 2022 Data: Occupant Protection in Passenger Vehicles
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-05-01 | PDF
    According to the National Highway Traffic Safety Administration’s 2022 National Occupant Protection Use Survey, the estimated seat belt use rate over the decade 2013 to 2022 increased from 87.2 percent in 2013 to 91.6 percent in 2022. There were 42,514 traffic fatalities in the United States in 2022, of which 25,420 (60%) were occupants of passenge ...
  • Evaluating the Structural Properties and CostEffectiveness of GrapheneModified Asphalt Research Brief
    Evaluating the Structural Properties and Cost-Effectiveness of Graphene-Modified Asphalt [Research Brief]
    Senseney, Christopher T ;
    Tucker, Joseph L
    2024-05-01 | PDF
    The execution of this study involved laboratory testing, AASHTOWare Pavement ME design simulations, and LCCA of pavement designs with different asphalt pavement mixture scenarios. The asphalt binders with different GO dosages were subjected to a series of laboratory tests in the CDOT asphalt laboratory including the Dynamic Shear Rheometer (DSR), t ...
  • Addressing Multimodal Transportation Needs through Complete Streets Implementation
    Addressing Multimodal Transportation Needs through Complete Streets Implementation
    Stavropoulou, Eirini ;
    Stamatiadis, Nikiforos
    2024-05-01 | PDF
    Since the early 2000s, over 1,600 transportation agencies in the United States have adopted Complete Streets policies. Recently, the Kentucky Transportation Cabinet (KYTC) published its Complete Streets, Roads, and Highways Manual, which aims to implement a safe and equitable transportation system throughout the state, as well as a Complete Streets ...
  • Estimation of Benefits from Pedestrian and Bicycle Improvements
    Estimation of Benefits from Pedestrian and Bicycle Improvements
    Tzamakos, Dionysios ;
    Stamatiadis, Nikiforos
    2024-05-01 | PDF
    Delivering safe mobility for all users of the transportation system is a key priority of the Kentucky Transportation Cabinet (KYTC). Because many system users rely on pedestrian and bicycle facilities, it is critical for KYTC to balance pedestrian and bicycle facility accommodations with those for motorized users. Currently, the Strategic Highway I ...
  • Effects of Legalization of Marijuana on Traffic Transportation Research Synthesis
    Effects of Legalization of Marijuana on Traffic: Transportation Research Synthesis
    CTC & Associates LLC
    2024-05-01 | PDF
    The legalization of recreational marijuana use in Minnesota in August 2023 prompted interest in the law’s potential impacts on traffic safety. MnDOT’s Office of Traffic Engineering requested this Transportation Research Synthesis (TRS) to learn from the experiences of other states with longer-standing laws legalizing the recreational use of marijua ...
  • Best Practices for Boulevard Tree Selection
    Best Practices for Boulevard Tree Selection
    Miller, Susan ;
    Siro, Lia
    2024-05-01 | PDF
    Communities seeking success in placemaking and improved green space in the boulevards are encouraged to develop a Street Tree Master Plan. In 2008, the Minnesota Local Road Research Board developed The Road to a Thoughtful Street Master Plan: A practical guide to systematic planning and design for communities to evaluate their goals and objectives ...
  • Calibrating the Highway Safety Manual Predictive Methods for Texas Highways Technical Report
    Calibrating the Highway Safety Manual Predictive Methods for Texas Highways: Technical Report
    Geedipally, Srinivas R. ;
    Pratt, Michael P.
    2024-05-01 | PDF
    The Highway Safety Manual (HSM) contains safety performance functions (SPFs) that are used in project-level decision-making to estimate the average crash frequency by severity level for existing conditions, alternatives to existing conditions, or proposed new roadways. Because most existing HSM SPFs were developed for states other than Texas, SPF c ...
  • Evaluation of Traffic Safety for Heavy Commercial Vehicles at Roundabouts in Minnesota
    Evaluation of Traffic Safety for Heavy Commercial Vehicles at Roundabouts in Minnesota
    Wagner, Mark ;
    DeVoe, Eric
    2024-05-01 | PDF
    Modern roundabouts have been shown to be one of the safest methods of control for at-grade intersections. An evaluation of traffic safety at roundabouts published by MnDOT in 2017 shows substantial decreases in fatal and serious injury crashes at intersections after installation of a roundabout. Despite these benefits, concerns have been raised fro ...
  • Evaluating the Structural Properties and CostEffectiveness of GrapheneModified Asphalt
    Evaluating the Structural Properties and Cost-Effectiveness of Graphene-Modified Asphalt
    Senseney, Christopher T ;
    Tucker, Joseph L
    2024-05-01 | PDF
    Graphene oxide (GO) is a nanoscale material created from graphite. GO has the potential to increase the service life of asphalt binders and asphalt mixtures, but there are concerns about the high cost of GO. The objective of this study is to provide the cost benefit of using GO in neat and SBS modified asphalt binders for a simulated asphalt paveme ...
  • Validating AASHTO PP84 Paste Volume Limits for Shrinkage Mitigation in UDOT Concrete Mixes
    Validating AASHTO PP-84 Paste Volume Limits for Shrinkage Mitigation in UDOT Concrete Mixes
    Al Sarfin, Md. Abdullah ;
    Sorensen, Andrew D.
    2024-05-01 | PDF
    This document presents the findings of an experimental study to evaluate the effect of the paste volume on the Utah Department of Transportation (UDOT) approved concrete mixtures. The AASHTO PP-84-17 provisional specification limits the maximum paste volume to 25%, while the selected UDOT approved mixtures have paste volume over 27%. The selected m ...
  • Developing Guidelines for the Use of Lightweight Materials in Culvert Preservation
    Developing Guidelines for the Use of Lightweight Materials in Culvert Preservation
    Sun, Charlie ;
    Ashurst, Kean H.
    2024-05-01 | PDF
    This study addresses challenges that arise during highway embankment construction on road widening projects when additional fill is placed above existing culverts. Researchers conducted reduced-scale model laboratory tests to simulate culvert behavior under different loading conditions and to determine how well lightweight materials (LWMs) perform ...
  • Smart Work Zone Control and Performance Evaluation Based on Trajectory Data
    Smart Work Zone Control and Performance Evaluation Based on Trajectory Data
    Xie, Yuanchang ;
    Bhuyan, Zubin
    2024-05-01 | PDF
    Work zone control strategies, such as taper length and transverse rumble strips, have the potential to significantly impact traffic operations and safety. The performance of these strategies is often evaluated based on traffic throughput, time headway, speed, and travel time measured at multiple locations or over a segment. Such metrics do not prov ...
  • Peak Temperature Determination of Drilled Shafts Excluded From Mass Concrete Consideration in Current Specifications Summary
    Peak Temperature Determination of Drilled Shafts Excluded From Mass Concrete Consideration in Current Specifications [Summary]
    Armenteros, Jose ;
    Mullins, Gray
    2024-05-01 | PDF
    The objective of this research project was to develop and implement methods to predict peak and differential temperatures of drilled shafts to determine if unsafe temperature conditions may arise for a given design.
  • Calibrating the Highway Safety Manual Predictive Methods for Texas Highways Technical Report 5708301R1
    Calibrating the Highway Safety Manual Predictive Methods for Texas Highways: Technical Report [5-7083-01-R1]
    Geedipally, Srinivas R. ;
    Pratt, Michael P.
    2024-05-01 | PDF
    The Highway Safety Manual (HSM) contains safety performance functions (SPFs) that are used in project-level decision-making to estimate the average crash frequency by severity level for existing conditions, alternatives to existing conditions, or proposed new roadways. Because most existing HSM SPFs were developed for states other than Texas, SPF c ...
  • Modeling Pedestrian and Bicyclist Crash Exposure with LocationBased Service Data
    Modeling Pedestrian and Bicyclist Crash Exposure with Location-Based Service Data
    Nam, Yunwoo ;
    Hawkins, Jason
    2024-05-01 | PDF
    The rising popularity of non-motorized transportation has brought about safety risks. The inclusion of accurate traffic volume information is one of the key elements to produce robust outcomes when researching safety. The project investigates and enhances transportation safety for pedestrians and bicyclists, emphasizing the integration of Location- ...
  • Development of an Implementation Plan for Sustainable Transportation Infrastructure Systems in Iowa Tech Brief
    Development of an Implementation Plan for Sustainable Transportation Infrastructure Systems in Iowa [Tech Brief]
    Lee, Hosin “David”
    2024-05-01 | PDF
    The primary goal of this study is to develop an implementation plan for achieving more sustainable transportation infrastructure systems for Iowa DOT and local road agencies. The specific objective of this research is to develop a systemic methodology for identifying the best sustainable practices for implementation in transportation infrastructure ...
  • 2019 NonTraffic Surveillance System Coding and Validation Manual
    2019 Non-Traffic Surveillance System Coding and Validation Manual
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-05-01 | PDF
    The Non-Traffic Surveillance (NTS) system is a virtual data collection system of which one part is designed to gather data on fatalities and injuries that occur in nontraffic crashes, which can occur on private roads, driveways, and parking lots. The NTS program accepted potential crashes only from FARS analysts and from sampled Crash Report Sampli ...
  • Update of Commercial Vessel Past Point Data for Designing Bridges Across Navigable Florida Waterway Summary
    Update of Commercial Vessel Past Point Data for Designing Bridges Across Navigable Florida Waterway [Summary]
    Kosar, Matthew ;
    Randell, Alexander
    2024-05-01 | PDF
    The objectives of this study were to update the FDOT vessel past point database that characterizes modern vessel traffic throughout navigable waterways in Florida and to develop updated models of future traffic projection.
  • Design and Analysis of Resilient Vehicular Platoon Systems over Wireless Networks
    Design and Analysis of Resilient Vehicular Platoon Systems over Wireless Networks
    Shui, Tingyu ;
    Saad, Walid
    2024-05-01 | PDF
    Connected vehicular platoons provide a promising solution to improve traffic efficiency and ensure road safety. Vehicles in a platoon utilize on-board sensors and wireless vehicle-to-vehicle (V2V) links to share traffic information for cooperative adaptive cruise control. To process real-time control and alert information, there is a need to ensure ...
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