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.
This project developed a high-level best practices guidance document for the design/installation of subsurface drainage. This Tool serves as a guide to assist agencies in understanding drainage problems and options to consider for mitigating structural damage to pavements due to moisture. The weather and soil conditions vary drastically across Minn
...
While pedestrian safety countermeasures contribute to reducing vehicle-pedestrian crashes, their impacts on winter maintenance operations are sometimes overlooked during design. There is a need to investigate the best practice guidance and solutions for the design, installation and maintenance of pedestrian safety features for year-round maintenanc
...
Polymer-modified binders (PMB) have been shown over the decades to improve the mechanical properties of asphalt mixtures compared to unmodified binders. Considering its higher initial cost, selecting the best alternative is very important, especially for local agencies, given their limited budgets. A challenge in the materials selection process for
...
This Minnesota Department of Transportation-sponsored research effort examined innovative right-of-way projects nationwide, focusing on how new and innovative practices for redeveloping transportation assets can meet ambitious goals such as mitigating environmental impacts, encouraging placemaking, and enhancing economic opportunity while continuin
...
This report examines existing guidelines in Idaho and in other states that lead in the implementation of UAS, in order to identify strategies to promote and regulate their use in Idaho’s airspace from the surface to 400 feet AGL. UAS innovations accelerate project delivery, increase roadway safety, reduce congestion, and improve environmental susta
...
This project studies the benefits and barriers of increased adoption of medium-duty and heavy-duty electric trucks, referred to as e-trucks, and presents a methodology for optimizing the location of e-truck charging stations in Minnesota. In general, e-trucks provide zero tailpipe emissions and lower operating and maintenance costs. However, some b
...
The design of buried pipes, in terms of the allowable minimum and maximum cover heights, requires the use of both geotechnical and structural design procedures. The geotechnical procedure focuses on estimating the load on the pipe and the compressibility of the foundation soil. The focus of the structural design is choosing the correct cross-sectio
...
The goal of Complete Streets is to accommodate all road users and bring attention to the needs of vulnerable road users. In the last 10 years, thousands of local/regional/state agencies in the United States (U.S.) have adopted Complete Streets policies. However, it is not clear how successfully these policies have been implemented and to what exten
...
The focus of this research project was to evaluate the impacts of the Complete Streets policy in Louisiana. The objectives of this research project included: (1) evaluating policy impacts to project scoping and delivery; (2) summarizing and evaluating what changes the agency has made in terms of documents, policies, staffing, training, etc. to adva
...
The accuracy and applicability of existing methodologies and tools for load rating of corrugated metal culverts under shallow cover were thoroughly investigated through numerical modeling and field testing. The basis of three existing spreadsheet rating tools were investigated. Two existing culverts that are more than 80 years old and whose cover o
...
This report outlines the process by which a portion of the I-15 Perry Rest Area in northern Utah was modified to include a functional pollinator habitat suitable for public education, outreach and enjoyment, as well as to provide much needed habitat for local pollinators, many of whom have experienced serious declines in their populations. Converti
...
Reduction in phosphorus is critical because phosphate, a dissolved form of phosphorus, sustains algal and cyanobacteria growth and causes a wide range of water-quality impairments in the ponds and downstream waters including algal blooms, excess floating plants, taste, and odor problems. Many stormwater ponds and wetlands that treat stormwater appe
...
In the design of highway bridges in Florida, glass fiber reinforced polymer (GFRP) materials are starting to replace mild carbon steel as the basis for reinforcing structural concrete components. Whereas traditional steel rebar is susceptible to corrosion, GFRP rebar is not, and therefore the use of GFRP has the potential to reduce maintenance cost
...
Snowplow operators are often tasked with clearing snow from roadways under challenging conditions. One such situation is low visibility due to falling or blowing snow that makes it difficult to navigate, stay centered in the lane, and identify upcoming hazards. To support snowplow operators working in these conditions, University of Minnesota resea
...
Public transportation agencies are constantly on the lookout for ways to reduce the number and severity of traffic crashes. One such solution is the Restricted Crossing U-turn, or RCUT, which has proven to be a safer alternative to traditional intersections on four-lane divided highways.
Widespread liquefaction and lateral spreading occurred after the 2002 M7.9 Denali fault earthquake. This provided a unique opportunity to evaluate lateral spreading displacement equations to areas of interior Alaska. The Newmark block analysis method and nonlinear solid-fluid coupled finite element models were used to assess the impact of seasonal
...
This project evaluated the viability of using the Cognivue Thrive to detect cognitive and physical impairment of drivers due to drugs. The device was tested in Boulder, Colorado during April of 2023 and results were compared with a blood sample. The report discusses lessons learned from testing of the Cognivue Thrive including technological, legal,
...
MnDOT maintains a significant portion of the state’s storm- water infrastructure. Managing stormwater is important to pre-vent flooding and associated safety risks; impacts to the environ-ment; and damage to property, roads and bridges.
Flaggers protect workers by providing temporary traffic control and maintaining traffic flow through a work zone. They are often the first line of defense to stop distracted, inattentive, or aggressive motorists from intruding into the work area. This project aims to develop an automated intrusion detection system to alert drivers who are unsafely
...
The objectives of this project are to: 1) develop recommendations for extender and recycling agent product approval and dosage selection; and 2) identify appropriate aging procedure(s) to simulate long-term oxidative aging coupled with test methods and parameters to characterize the cracking resistance of asphalt binders. Three NCDOT approved surfa
...
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.