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.
In April of 1987, Congress passed the Surface Transportation and Uniform Relocation Assistance Act (STURAA), which permitted states to raise their maximum speed limit on rural interstate highways to 65 mph. Virginia's 65 mph speed limit went into effect on July 1, 1988, for passenger vehicles and on July 1, 1989, for commercial buses. This is the f
...
The Virginia Department of Transportation (VDOT) has been using a herbicide in the form of glyphosate for the control of unwanted species in created wetlands. Results with this particular herbicide have been somewhat mixed. It was requested that the Virginia Transportation Research Council investigate other means of invasive species control that ar
...
Porous pavements or open graded asphalt mixtures have been in use in Oregon since the late 1960s. The use of this pavement type has increased over the years because the pores in the mat provide a better way for water to drain from the surface. This greatly increases the safety in the areas of skid resistance and splash and spray. Added benefits to
...
The Georgia Department of Transportation (GDOT) has been constructing recycled asphalt pavements routinely for about four years. This research project was undertaken to evaluate the performance of recycled pavements in comparison to virgin (control) asphalt pavements.
The objective of this investigation was to evaluate the feasibility of using high-strength concrete in the design and construction of highway bridge structures. A literature search was conducted; a survey of five regional fabrication plants was performed; concrete mix designs were studied in the laboratory and in the field; tests of nine full-scale
...
The Oregon Department of Transportation (ODOT) controls the quality of its asphaltic concrete (AC) paving mixtures by using a statistical pay factor system based on random sampling and testing of aggregate gradation, asphalt content, and compaction density. Concerns about potential toxicity of solvents used for asphalt extraction led to the desire
...
The response of bridge structures to moving loads is investigated using modal superposition methods. Two distinct modal superposition methods are available: the modedisplacement method and the mode-acceleration method. While the mode-displacement method is widely used in the analysis of both continuous and discrete systems, the mode acceleration me
...
This report describes research to determine how the Northern Virginia Traffic Management System (TMS) operations may be improved by making modifications to the existing system. This study was completed during the period of June through September, 1993. The TMS has the potential to both improve incident response as well as provide commuters with tim
...
The report is an updated version of "A Manual for the Repair and Protection of Hydraulic Cement Concrete Bridge Decks" (VTRC 90-TAR2). The report was prepared for Chapter 2 of the Hydraulic Cement Concrete Construction School Study Guide which is distributed by the Virginia Department of Transportation at Hydraulic Cement Concrete Construction Scho
...
The increase in the number of nonwork trips during the past decade has contributed substantially to congestion and to environmental problems. Data collection methodologies, descriptive information, and reliable models of nonwork travel behavior are needed to accurately forecast traffic volumes and to develop and assess policies aimed at alleviating
...
This study focuses on defining HOV systems and their components, criteria, and related issues in a systems planning context (as compared with the conventional project level planning). Definitions are provided to establish the physical and socioeconomic elements of HOV systems. Appropriate system performance criteria are developed for the purpose of
...
The Transportation Planning Division (TPD) of the Virginia Department of Transportation (VDOT) is currently considering seven corridors along which VDOT may build the future Interstate 73. The division describes these seven routes and their variants in a report entitled Possible Interchange Locations/Potential I-73 Corridors (December 1993). The pu
...
The Transportation Planning Division of the Virginia Department of Transportation (VDOT) is currently considering seven corridors along which VDOT may build the future Interstate 73. The purpose of this technical assistance project is to estimate the impact that construction of I-73 along any one of these corridors would have on the state's economy
...
National Center for Statistics and Analysis (U.S.)
1994-01-01
|
PDF
The National Highway Traffic Safety Administration (NHTSA) defines a fatal traffic crash as being alcohol-related if either a driver or a nonoccupant (e.g., pedestrian) had a blood alcohol concentration (BAC) of 0.01 grams per deciliter (g/dl) or greater in a police-reported traffic crash. Traffic fatalities in alcohol-related crashes dropped by 5
...
United States. Maritime Administration. Office of Statistical and Economic Analysis
1994-01-01
|
PDF
This report summarizes U.S. cargo which moved via Canada in 1993. Summaries areprovided showing transshipped cargo through Canada, in historical perspective,by customs district, by country and by leading Harmonized 4-digit commodity code. Appendices E-1 and I-1 are summaries of trade by country within customs district. Appendices E-2 and I-2 contai
...
This report presents statistical information pertaining to the Federal Aviation Administration, the National Airspace System, Airports, Airport Activity, U.S. Civil Air Carrier Fleet, U.S. Civil Air Carrier Operating Data, Airmen, General Aviation Aircraft, Aircraft Accidents, Aeronautical Production and Imports/Exports, and a Glossary of the terms
...
National Center for Statistics and Analysis (U.S.)
1994-01-01
|
PDF
A school bus-related crash is a crash which involves, either directly or indirectly, a school bus-type vehicle, or a vehicle functioning as a school bus, transporting children to or from school or school-related activities. Since 1983, 1,572 people have died in school bus-related crashes - an average of 143 fatalities per year. Most of the people w
...
Work zone speeds have customarily been regulated by standard regulatory or advisory speed signs. However, most drivers do not slow down in response to these static speed control measures. The changeable message sign (CMS) with radar unit has dynamic capabilities which may be more effective in altering driver behavior. The radar, attached directly t
...
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.