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.
Mitigating traffic congestion and reducing transportation emissions are among the leading goals of most local, regional, national, and international agencies. Several guidelines rely primarily on strategies that support the following: 1) mixed land-use and transit-oriented developments, 2) multimodal transportation systems, and 3) design of active
...
Buffalograss (Buchloë dactyloides [Nutt.] Engelm.) is a native low maintenance turfgrass species that is well adapted for lawns, parks, athletic fields, roadsides, and golf courses in the transition zone of the Midwestern United States. Perennial ryegrass (Lolium perenne) has also been used in many states as perennial roadside vegetation. Blending
...
Freeway corridors in most of Ohio’s major cities exhibit recurring and non-recurring congestion. Traffic responsive metering is particularly attractive due to its ability to dynamically respond to the inevitable fluctuations in traffic. ODOT has ramp meters in operation on two urban freeway corridors in the state. However, performance of these mete
...
Wood guardrail posts can be inspected for decay using a non-destructive testing (NDT) technique called stress wave timing (SWT). This project conducted a field investigation on approximately 500 wood guardrail posts using SWT and then analyzed available data to determine factors that may lead to increased wood decay rates. It was determined that lo
...
This report provides the Highway Safety Manual (HSM) calibration factors for the state of South Carolina. In this report, all facility types analyzed in HSM part C, are calibrated using the crash data of 2013 to 2015. Crash distribution tables are also provided using the observed crashes from 2011 to 2015. Finally, state-specific safety performance
...
Intersections within roadway systems create points of conflict for motorists and nonmotorized users who turn onto or cross another path of traffic. While intersections make up only a small part of the highway system, they are the points at which more than 50 percent of urban crashes and over 30 percent of rural crashes occur, according to a 2004 re
...
Missouri. Department of Transportation. Construction and Materials Division
2018-12-01
|
PDF
Chip seals have been widely used as a pavement maintenance surface treatment due to its competitive cost and construction time. Recently, the research team developed a rubberized chip seal where natural aggregate is replaced with crumb rubber obtained from recycled tires. During this study, laboratory chip seal specimens and a field chip seal secti
...
Oklahoma Department of Transportation (ODOT) is committed to protect and enhance human and natural environment while developing a safe, economical, and effective transportation system. The first objective of this research was to evaluate the availability of the recycled materials and develop strategies for increasing use of recycled materials in OD
...
This study introduces proper design and retrofitting techniques to mitigate slope failure in Nebraska based on experimental and analytical research. The geological history, unique soil properties, failure mechanisms and potential new design/retrofitting methods are accounted for in this study. The following are the key findings. Nebraska is covered
...
This report describes research assessing the functional safety of accelerator control systems with electronic faults, such as errant electronic throttle control signals, following an industry process standard. This study focuses specifically on errant signals in motor vehicles with fuel cell hybrid electric propulsion. This study follows the concep
...
Missouri. Department of Transportation. Construction and Materials Division
2018-12-01
|
PDF
This study investigated the feasibility of using locally available fly ashes (FAs) to synthesize zero-cement concrete (ZCC) for different structural and repair applications. Using ZCC made of 100% FA reduces global CO2 emissions, saves energy, and decreases raw material consumption during the production process of ordinary Portland cement.
Geocells are robust, lightweight, three-dimension-al fabricated systems that are expandable on-site to form a honeycomb-like structure. Geocells have been intermittently used in roads; they provide lateral reinforcement that increases the bearing capacity of the subbase and subgrade pavement layers. The following are the objectives of this project:
...
In July 2018, the new Raleigh Union Station (RUS) opened for business in the Warehouse District of downtown Raleigh to address forecasted population growth and the operational need for expanded service capabilities. The Americans with Disabilities Act (ADA) requires that railway platforms be easily accessible and usable for all individuals, includi
...
This project focused on implementing the 3DOBS technology (developed under Phase I and Phase II) for successful detection, quantification, and visualization of concrete bridge deck distress features at near-highway speeds for routine MDOT inspections. The integration and further re-defining of the 3DOBS methods into MDOT practices was accomplished
...
The objective of this project is to define and quantify risk at highway rail grade crossings. Even though there are models available in the literature to predict the number of accidents at a crossing location this alone is not sufficient to quantify the risk at a location. This study defines the risk at a crossing by considering the number and seve
...
This Final Report is to summarize several main achievements of this project as follows: (1) Automation Method and its Tools for the Tidal Wetland Identification and Analysis Process using QL2; (2) Method Development for Tidal Wetland Identification Process; (3) Reliability and Flexibility of Automation Tools and Methods; and (4) User Friendly deliv
...
A subset of the SHRP2 data was used to construct the datasets used for the analyses in the project. The general aim of this project was to investigate and develop statistical models predicting individual driver crash involvement based on driving style, demographic and behavioral history data. For each individual driver, six consecutive calendar mon
...
The objective of this research is to develop a set of design and operational recommendations to reduce the number of rollover, jackknife, and rollback end positions for trucks entering the emergency ramp. To do so, the research team used several strategies including a review of literature, appraisal of incident reports, conduct field observations a
...
As the U.S. population ages, increasing numbers of older adults are likely to find themselves needing to limit or cease driving, and may find their mobility options severely limited as a result. Transportation network companies (TNCs), which provide on-demand transportation in many cities and suburbs, are an underutilized resource among adults over
...
A bump at the approach of a bridge is an undesirable characteristic that causes bad ride quality and high maintenance costs. To mitigate bump formation, the Iowa Department of Transportation (DOT) revised its standards according to a former study completed in 2005. This current study evaluated the effectiveness of these revisions by investigating e
...
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.