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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 1341 - 1360 of 35865 results
  • Public Awareness on Distracted Driving of CAVs and Evaluating the Distractions
    Public Awareness on Distracted Driving of CAVs and Evaluating the Distractions
    Jeihani, Mansoureh ;
    Javid, Ramina
    2024-01-16 | PDF
    Distracted driving is a major concern in traffic safety, leading to many fatal crashes in the United States in recent years. Every year, distracted driving costs lives. In the U.S., distracted driving claims the lives of nine people per day. With the increasing presence of CAV technologies, there is a corresponding rise in the quantity of auditory ...
  • RAP and RAS in HMA Pilot Project on ELD 49 Material Testing Observations and Findings
    RAP and RAS in HMA Pilot Project on ELD 49: Material Testing, Observations, and Findings
    Harvey, John ;
    Buscheck, Jeffrey
    2024-01-02 | PDF
    A pilot project for the inclusion of recycled asphalt shingles (RAS) in hot mix asphalt (HMA) was built on State Route 49 in El Dorado County in November 2021. Four mixes were included in short test sections: (1) a control mix with no RAS or recycled asphalt pavement (RAP), (2) a typically used mix with 10% RAP that was also used for construction o ...
  • Using AVLGPS Telematics to Optimize Snowplowing
    Using AVL/GPS Telematics to Optimize Snowplowing
    Minnesota Local Road Research Board
    2024-01-01 | PDF
    Minnesota’s cities and counties continue to use data to improve operations and are leveraging newer technologies to work smarter. Use of telematics – activating communication systems to share real time information – is transforming local agencies opportunity for continuous optimization with Automatic Vehicle Location (AVL) systems using Global Posi ...
  • Repair or Strengthening of Bridge Decks with PartialDepth Precast Deck Panels
    Repair or Strengthening of Bridge Decks with Partial-Depth Precast Deck Panels
    Pantelides, Chris P. ;
    Briggs, Dylan T
    2024-01-01 | PDF
    The primary objectives of this research project involve: (a) forensic analysis of composite deck samples from the I-15 800 South bridge; (b) replication of non-composite specimens for testing; (c) destructive testing of retrofitted non-composite deck samples; and (d) recommended solutions for the repair of bridges affected by debonding of the cast- ...
  • Using AVLGPS Telematics to Optimize Snowplowing
    Using AVL/GPS Telematics to Optimize Snowplowing
    Local Road Research Board  ...
    2024-01-01 | PDF
    Minnesota’s cities and counties continue to use data to improve operations and are leveraging newer technologies to work smarter. Use of telematics – activating communication systems to share real time information – is transforming local agencies opportunity for continuous optimization with Automatic Vehicle Location (AVL) systems using Global Posi ...
  • Development of a Mobile App for Reporting Work Zone Intrusions
    Development of a Mobile App for Reporting Work Zone Intrusions
    Davis, Brian ;
    Morris, Nichole L.
    2024-01-01 | PDF
    Work zone intrusions represent a significant safety risk to workers. To help better understand these situations, the Minnesota Department of Transportation partnered with the University of Minnesota to create a method to document intrusion events. This information provides a deeper understanding of the circumstances under which these events occur a ...
  • Development of Traffic Video Analysis Tool for Highway Safety Performance Evaluation
    Development of Traffic Video Analysis Tool for Highway Safety Performance Evaluation
    Zhou, Huaguo ;
    Zhao, Zijie
    2024-01-01 | PDF
    Recent advances in computer vision techniques have enabled the use of traffic video data for valuable surrogate safety measures to improve highway safety evaluations. However, few tools specifically target abnormal traffic events like wrong-way driving (WWD) or illegal left turns. This research aims to develop a cost-effective video analytic tool, ...
  • OSTR Research Roundup Newsletter January 2024 Special TRB Edition
    OST-R Research Roundup Newsletter: January 2024 [Special TRB Edition]
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-01-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Evaluation of Methods for UDOT Brine Tank Condition Assessment
    Evaluation of Methods for UDOT Brine Tank Condition Assessment
    Kami, Moein Ramezanpour ;
    Zhang, Keping
    2024-01-01 | PDF
    UDOT manages statewide above-ground storage tanks to store brine as deicing chemicals for the winter maintenance program. The polyethylene storage tanks will age under UV light, become brittle with low temperatures, creep, and develop cracks. Structural failures of brine tanks will not only impose safety hazards to surrounding tanks and UDOT person ...
  • Development of Guideline for the Use of Geosynthetics in Different Roadway Layered System in Nebraska
    Development of Guideline for the Use of Geosynthetics in Different Roadway Layered System in Nebraska
    Eun, Jongwan ;
    Kim, Seunghee
    2024-01-01 | PDF
    This study evaluated the design properties of the geosynthetic reinforced soils for the roadway pavement and compared the reinforcing performance depending on different geosynthetics and soil types, particularly for a subgrade layer in Nebraska. The results obtained from a large direct shear test, pullout test, and soil chamber test with a dynamic ...
  • Minnesota Drive Ramps Micro Surfacing Experimental Feature
    Minnesota Drive Ramps Micro Surfacing Experimental Feature
    Pavey, Andrew
    2024-01-01 | PDF
    During the 2020 construction season, the Alaska DOT&PF Central Region installed its first application of micro surfacing at 17 locations on Minnesota Drive ramps in the city of Anchorage. This treatment offers the potential to be a more economical solution to the typical mill and fill hot mix asphalt (HMA) treatment used to address rutted roads. Mi ...
  • Innovative Pothole Repair Materials and Techniques Volume I Asphalt Pavement
    Innovative Pothole Repair Materials and Techniques Volume I: Asphalt Pavement
    Wang, Hao ;
    Chen, Xiao
    2024-01-01 | PDF
    Potholes in asphalt pavement surface have detrimental effects on asphalt pavement deterioration and traffic safety. Cost-effective pothole repair methods are needed for highway agencies at all levels. This project aims to identify and evaluate innovative tools, technologies and materials for pothole repair in New Jersey. The pothole repair methods ...
  • Innovative Pothole Repair Materials and Techniques Volume II Concrete Structures
    Innovative Pothole Repair Materials and Techniques Volume II: Concrete Structures
    Najm, Husam ;
    Balaguru, Bala
    2024-01-01 | PDF
    Long lasting and durable repair materials are necessary for maintaining concrete pavements, concrete bridge decks, and substructure to prevent deterioration and ensure longer service life. Rapid setting cementitious patch repair materials are popular for repairing small concrete damages and providing a functional repair within few hours. Based on e ...
  • Innovative Pothole Repair Materials and Techniques Concrete Structure Technical Brief
    Innovative Pothole Repair Materials and Techniques – Concrete Structure [Technical Brief]
    Wang, Hao ;
    Venkiteela, Giri
    2024-01-01 | PDF
    The primary objectives of the investigation are 1) Developing rapid setting patch repair materials for overhead, vertical, and horizontal concrete repair pertaining to the requirements of NJDOT; 2) Evaluating the developed mix formulations based on workability, compressive strength, and flexural strength gain in 3 and 24 hours; 3) Evaluating the lo ...
  • Innovative Pothole Repair Materials and Techniques Asphalt Pavement Technical Brief
    Innovative Pothole Repair Materials and Techniques – Asphalt Pavement [Technical Brief]
    Wang, Hao ;
    Venkiteela, Giri
    2024-01-01 | PDF
    This project aims to identify and evaluate innovative tools, technologies and materials for pothole repair in New Jersey. In particularly, the use of hot-mix asphalt, cold mix asphalt, and recycles asphalt material with preheating is investigated.
  • Developing Safety Performance Functions for Utah Roadways and Intersections
    Developing Safety Performance Functions for Utah Roadways and Intersections
    Schultz, Grant G. ;
    Warr, Richard L
    2024-01-01 | PDF
    The Highway Safety Manual (HSM), published by the American Association of State Highway and Transportation Officials (AASHTO) provides guidance as to the development of predictive models used to estimate the predicated average crash frequency for a particular site using regression models developed from data for similar sites across a network. These ...
  • Innovative Pothole Repair Materials and Techniques Volume II Concrete Structures Technical Brief
    Innovative Pothole Repair Materials and Techniques Volume II: Concrete Structures [Technical Brief]
    Wang, Hao ;
    Venkiteela, Giri
    2024-01-01 | PDF
    Long lasting and durable repair materials are necessary for maintaining concrete pavements, concrete bridge decks, and substructure to prevent deterioration and ensure longer service life. Rapid setting cementitious patch repair materials are popular for repairing small concrete damages and providing a functional repair within few hours. Based on e ...
  • Traffic Safety Evaluation of Signalized Intersections with Retroreflective Backplates in Minnesota
    Traffic Safety Evaluation of Signalized Intersections with Retroreflective Backplates in Minnesota
    Moreland, Max ;
    Leuer, Derek
    2024-01-01 | PDF
    Between 2016 and 2021, MnDOT installed retroreflective signal backplate borders at 116 signalized intersections in Minnesota. Retroreflective signal backplate borders are intended to further increase visibility of the signal head both during the day and at night. The goal of installing retroreflectivity to backplates is to reduce crashes at the int ...
  • Driver Electronic Device Use in 2022 Traffic Safety Facts Research Note
    Driver Electronic Device Use in 2022 [Traffic Safety Facts - Research Note]
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-01-01 | PDF
    The percentage of passenger vehicle drivers talking on handheld phones decreased from 2.5 percent in 2021 to 2.1 percent in 2022. The percentage of drivers speaking with visible headsets while driving remained unchanged from the previous year’s level of 0.4 percent. Drivers' visible manipulation of handheld devices decreased from 3.4 percent in 202 ...
  • Drivers Correctly Interpret Flashing Yellow Arrows for Left Turns Research Summary
    Drivers Correctly Interpret Flashing Yellow Arrows for Left Turns [Research Summary]
    Davis, Gary A. ;
    Lund, Victor
    2024-01-01 | PDF
    Permissive left turns, where a driver does not have a green arrow and must wait for a gap in oncoming traffic before turning, can be indicated by different traffic signal configurations. Flashing yellow arrows are becoming a preferred signal type in Minnesota and across the nation. New research provides traffic engineers with confidence that driver ...
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