Based on the May 22 to June 6, 1992, initial findings of the U.S. Tour of European Concrete Highways (U.S. TECH), follow-up visits to Germany and Austria were made October 10 to 22, 1992. The purpose of the tour was to accomplish the following: 1. Obtain sufficient information to construct experimental sections in Michigan and other States using th
...
United States. National Technical Information Service
1993-09-01
|
PDF
Traffic engineers have long recognized that the elimination of unexpected events and the separation of decision points simplifies the driving task. Since access control reduces the number and complexity as well as increases the spacing of events to which the driver must respond, it will result in improved traffic operations and reduced accident exp
...
Equations for estimating scour depth at bridge structures was developed from model and field data presented at the Symposium on Scour at Bridges in China, 1964. These equations have been used in highway and railway engineering in China for more than 20 years. This report is based on a recent research paper for improving these equations by Gao and X
...
John A. Volpe National Transportation Systems Center (U.S.)
1993-09-01
|
PDF
The Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 calls for a study of U.S. international border crossings. The objective of the study is to identify existing and emerging trade corridors and transportation subsystems that facilitate trade between the United States, Canada, and Mexico. The report contains appendices to the invent
...
John A. Volpe National Transportation Systems Center (U.S.)
1993-09-01
|
PDF
The Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 calls for a study of U.S. international border crossings. The objective of the study is to identify existing and emerging trade corridors and transportation subsystems that facilitate trade between the United States, Canada, and Mexico. The report contains appendices to the invent
...
Under the U.S. National Timber Bridge Initiative Program, sponsored by Congress in 1989 and administered by the United States Department of Agriculture, Forest Service, approximately 130 modern timber bridges are currently in service in 41 participating States. Most of these bridges use stress-laminating technology. Considerable research on stress-
...
One of the identified truck accident types that occur on curved exit ramps at interchanges is truck rollover. A truck will overturn or rollover if the lateral acceleration imposed upon it as it travels around a curve of a certain radius and superelevation is greater than allowable given its loading condition. Also, there is a speed at which rollove
...
A set of very simple rules for driving behavior used to simulate roadway traffic gives realistic results. Because of its simplicity, it is easy to implement the model on supercomputers (vectorizing and parallel), where we have achieved real time limits of more than 4~million~kilometers (or more than 53~million vehicle sec/sec). The model can be use
...
A Peaceful Campaign of Progress and Reform: The Federal Highway Administration at 100; A New Era in FHWA Leadership; National Geotechnical engineering Experimentation Sites; The Pacific Rim TransTech Conference; Changeable Message Signs: Avoiding the Design and Procurement Pitfalls
Medians on divided highways may be used as recovery areas by out-of-control vehicles. In some regions, the median widths of new highways are being minimized to control the amount of right-of-way required, and in others, existing highway medians are being reduced so that additional travel lanes can be built to improve capacity. Such actions tradeoff
...
The main cause of concrete pavement blowups are axial compression forces induced into the pavement by a rise in temperature and moisture. Recent analyses by this writer and his students were based on the notion that blowups are caused by lift-off buckling of the pavement. The cases analyzed were: (1) continuously reinforced concrete pavement and (2
...
United States. Department of Transportation. Federal Highway Administration. Office of Highway Information Management
1993-08-01
|
PDF
This Manual contains the specifications for the preparation of the various types of data reported and instructions for building and editing the data set, and includes a timetable for coordinating and updating the various data items/components of the HPMS. All HPMS data are to represent conditions as of December 31 of the data year. Travel data shou
...
This project includes a literature review and accident analysis that supported the hypothesis that age differences in motion perception capabilities represent a likely source of difficulty for specific traffic maneuver problems experienced by older drivers. A feasibility study was performed to evaluate the most appropriate apparatus for use in late
...
A recent analysis of the 1990 National Personal Transportation Survey (NPTS) noted that "between 1969 and 1990, the number of households, drivers, workers, and vehicles grew at a much faster rate than the population."1 From 1983 to 1990, daily vehicle miles travel per household increased by nearly 29 percent. This trend confirms the fact that the d
...
The purpose of this study was to establish empirical relationships between truck accidents and highway geometric design. First, statistical frameworks based on Poisson and negative binomial regression models were proposed. Preliminary models were then developed using accidents and road inventory data from the Highway Safety Information System (HSIS
...
In the United States, movement of freight and passengers is of critical importance; national productivity depeds on fast and reliable transportation. As a Nation we spend over $959 illion annually on tranposrtation services, the equivalent of 16.9 percent of the grsos national product (GNP). The components of the cost of these tranposrtation servic
...
On August 25-27, 1992, a major forum of 80 knowledgeable individuals representing researchers, manufacturers, and users of nondestructive evaluation (NDE) methods and equipment for bridges was convened to exchange information and to provide guidance for studies of NDE of bridges proposed as a part of the Federal Highway Administration's High Priori
...
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.