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.
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
...
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
...
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,
...
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
...
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
...
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
...
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
...
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
...
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
...
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.
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
...
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
...
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
...
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
...
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
...
This is a report of research and technology transfer activities carried out by the Wisconsin Department of Transportation through the Part B research portion of the State Planning and Research Program of the Federal Highway Administration, U.S. Department of Transportation. The report describes activities during Federal Fiscal Year 2024, covering O
...
This study’s objective was to determine if access management treatments in Louisiana have an economic impact on roadside businesses. The specific access management treatments observed in this study are J-turns, right-in-right-out entrances, raised medians, raised curb channelization systems, and center turn lanes. The research focused on business s
...
This study aims to compare the feasibility of battery electric and hydrogen fuel cell powertrains for concrete mixer trucks to determine which is the better zero-emission powertrain for the industry to transition towards. Duty cycle modeling simulations are used to estimate both the component specifications required to meet the operational requirem
...
This paper develops Doppler-based Geometric Dilution of Precision (D-GDOP) analysis for time-diverse Doppler-only positioning and presents an associated batch filter. The former Doppler-only positioning solution requires at least eight satellites to be view simultaneously and discards previous Doppler measurements. In cases where fewer than eight s
...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.