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.
Concrete overlays have proven to be an effective maintenance treatment as they slow de-icing chemical and water penetration into the original deck surface. Typically, due to vibration, structural flexibility, and a weak bond between the concrete overlay and deck concrete (potentially because of poor construction), de-bonding develops at the boundar
...
Snowplows use substantial amounts of fuel to keep Minnesota’s winter roads safe and accessible. MnDOT spends over $2 million on diesel fuel annually for plowing operations. Reducing vehicle fuel consumption, in addition to cost savings, would help MnDOT meet its sustainability goal to achieve a 30% reduction in greenhouse gases (GHG) from 2005 leve
...
Demand-responsive microtransit services have operated in Utah since a pilot program debuted in Fall 2019. The Utah Transit Authority (UTA) and its partners see such services as providing key mobility in transit-limited areas, but how to prioritize which areas receive such services is an open question. In this research, we present a multi-agent dail
...
A community is considered walkable if it is easy as well as safe for pedestrians to walk for recreation, exercise, and to school, stores, parks, the post office, etc. Additionally, a walkable community encourages safe use of existing infrastructure while expanding transportation options for users with varied ranges of mobility. This report document
...
This report summarizes the results of a project that was completed to develop a system to allow multiple ODOT users with different administrative authority to locate and schedule different types of equipment in ODOT district and county garages. The project was divided into two phases. The results of Phase 1 indicated that the optimum tracking syste
...
This report summarizes the results of a project that was completed to develop a system to allow multiple ODOT users with different administrative authority to locate and schedule different types of equipment in ODOT district and county garages. The project was divided into two phases. The results of Phase 1 indicated that the optimum tracking syste
...
The main objective of this project was to gain a better understanding and insight as to why corrosion takes place at elevations higher than 12 feet above the mean high-water line (>MHWL+12) for tall components that are part of the substructure (piles, columns, footers) of bridges that are partially immersed. There are several factors that influence
...
Current Intelligent Transportation System (ITS) equipment used for "sensing" the operations of highways are very limited, both in geographic coverage and in the measured data they can provide. To effectively monitor, measure, and manage the Daily Vehicle-Hours of Delay (DVHD) on the transportation network, transportation agencies must again focus o
...
As the third most populous state in the U.S., Florida has many attractive qualities – sunshine and beaches, no state income tax, and a diversity of tourist attractions from the panhandle to the peninsula. But is Florida missing out on other business opportunities? Florida’s massive population growth brings an emphasis on freight and logistics. The
...
The New Jersey Department of Transportation (NJDOT) researched the predictive safety analysis tools available in the market and how they are being used by State Departments of Transportation (DOT). These tools have proliferated since the American Association of State Highway and Transportation Officials (AASHTO) released the Highway Safety Manual (
...
This project analyzes the impact that idling and snowfall have on the fuel consumed by Minnesota Department of Transportation (MnDOT)’s snowplow fleet, with the underlying objective to determine and advise MnDOT on ways to reduce fuel usage of the fleet using vehicle telematics data. This is a significant problem to solve as fuel use reduction cont
...
HB 21-1303, the “Buy Clean Colorado Act” requires contractors to submit EPDs for asphalt and asphalt mixtures, cement and concrete mixtures, and steel installed on CDOT projects. Ultimately, the bill instructs CDOT to establish greenhouse gas (GHG) emission limits for these materials, and contractors on CDOT construction projects will need to compl
...
The Federal Highway Administration currently requires pavement and bridge National Highway System assets to be managed through a formal plan at the statewide level regardless of ownership. The methods for Transportation Asset Management planning for pavements and bridges are relatively well defined and mature. To incorporate evolving technologies a
...
The objective of this research is to identify potential energy harvesting technology for applications on roadways and bridges and conduct feasibility analysis and performance evaluation of selected technologies for large-scale and micro-scale energy generation. The research outcome provides recommendations for future implementation of energy harves
...
This research advanced Geotechnical Asset Management (GAM) within DOTD. It describes the logic and software utilized to develop the DOTD retaining wall inventory and outlines a GAM path forward for the Department. The developed GAM GIS database provides geospatial locations, digital storage, digital rating applications, and visual interfaces for re
...
The U.S. Geological Survey (USGS), in cooperation with the Colorado Department of Transportation, developed peak-, mean- and low-streamflow regional-regression equations for estimating various streamflow statistics for natural streamflow in central and western Colorado. At the completion of the streamgage selection process, a total of 418 streamgag
...
Cracks weaken concrete and permit water and harmful chemical ingress into structures. Shrinkage also decreases the load-carrying capacity of bridges. This study investigates shrinkage cracking prevention of infrastructure concretes used in New Jersey. The 15 initial evaluation mixtures were first tested to evaluate their shrinkage behavior. Based o
...
This project included collection of UHPC connection details utilized by other states and examination of those details for applicability to use with the OU J3 non-proprietary UHPC, examination of different fiber sources and the effect of those fibers on properties of the OU J3 UHPC mix, consultation on and monitoring of UHPC projects in Oklahoma, an
...
The Louisiana Department of Transportation and Development (DOTD) District 05, which is in the northeastern corner of the state, spent 55,000 hours and over $1 million in 2016 attempting to maintain roadway edges along non-paved shoulders. Non-paved shoulders consist primarily of a soil and aggregate mixture, which is routinely disturbed and lost u
...
Construction and concrete production procedures are time sensitive and fast paced. As such, it is crucial to monitor the strength of concrete in real-time. Existing concrete strength testing methods, such as traditional hydraulic compression method specified by ASTM C 39 and the maturity method specified by ASTM C 1074, can be inaccurate, labor int
...
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.