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 report reviews selected portions of the literature concerning the psychology of negligent driving. In particular, it stresses those studies which attempt to quantify and predict aberrant driving behavior. Reviewed are such topics as the role of demographics and driving records in accident occurrence and accident proneness, and the use of perso
...
Representatives from the eight construction districts of the Virginia Department of Highways and Transportation were interviewed concerning their involvement in public hearings. The sample consisted of seven district engineers and eighteen other district officials. The interviews contained both open- and closed-end questions, and took from 40 minut
...
In general, relocatees in Virginia voiced a favorable opinion of the relocation program and the personnel running it, as is borne out by the 32 findings and conclusions listed.
This report is concerned with a study of the quantity and uniformity of the illumination on some selected sections of the roadway lighting on Rte. I-95 in Northern Virginia. The evaluation of the lighting was made to obtain data that could be used as a guide for the selection and design of future lighting systems or for possible modification of exi
...
Construction operations in highway corridors disturb the natural vegetation and land contours causing potential erosion sites if left denuded. Minimizing erosion on these areas is based on the principles of maximizing water infiltration and reducing water runoff obtainable with rough and stair-step grading to establish vegetative cover quickly. Rou
...
From a review of relevant research studies and laws of other states, it was concluded that changing the speed limit for vehicles of 6,501-10,000 pound gross weight would be premature pending further evidence that trucks of this size do not significantly differ from cars in their operational characteristics.
In 1941 two bridges were constructed with decks using concrete incorporating as an experimental feature the use of hydrated lime as an admixture in amounts varying from zero to 12%. After 35 years of service the decks were scheduled for repairs to correct surface spalling caused by corrosion of the reinforcing steel. Performance surveys were made i
...
Presented in this report is information concerning the characteristics of the concretes used to construct six experimental two-course bonded bridge decks in Virginia. The quality of the overlay concretes produced under standard specifications supplemented with special contract provisions is described. Recommendations are made concerning the attainm
...
Several aspects of the Hampton Roads Bridge-Tunnel facility were investigated to determine if a sunscreen was needed at the north entrance to the second tube. The analysis included accident records, measurements of the speed of vehicles entering the north portal of the old tube, photometric characteristics of this entrance, a study of visual perfor
...
There is no standard design procedure available for black base mixes containing aggregates larger than 1" (25.4 mm) This investigation dealt with the use of stability testing equipment similar to that used in the design of surface mixes and development of a compaction procedure for 6" (152. 4 mm) diameter specimens. A compaction procedure was devel
...
Eight satellite projects with asphaltic layer thicknesses varying from 3.5 inches (88 mm) to 13.5 inches (338 mm) were tested for dynaflect deflections during the four seasons of 1974-75. The projects were located throughout Virginia. The evaluation of the deflection data showed the maximum deflection, the area of the deflected basin, and the sprea
...
On August 15, 1975, the National Transportation Safety Board submitted a number of recommendations to the Administrator of the Federal Highway Administration and the Governor of Virginia regarding safety practices in the construction zone of I-495 in Northern Virginia. Subsequently, officials of the Virginia Department of Highways and Transportatio
...
In response to House Joint Resolution #41, an evaluation of the movement of 14-foot wide manufactured housing units was conducted on Virginia highways. The purpose of the study was to provide information concerning the transportation characteristics of wide housing units by highway which, along with other data such as economic and societal factors,
...
This report details the mechanics of implementing the computer program AIRPOL-4A. AIRPOL-4A supersedes AIRPOL-4. The upgrade from version 4 to version 4A is a result of the new emissions guidelines contained in Supplement 5 to AP-42, April 1975, by the Environmental Protection Agency. Appendix A details the mechanics of implementing the computer pr
...
In the widely used potentiometric titration procedure for the analysis of chloride in powdered hardened concrete samples, difficulties have often been encountered when determining the endpoint. These difficulties have been eliminated through the use of the Gran method of endpoint determination, which also simplifies the titrations and improves the
...
This volume summarizes the findings of the entire study. It presents a method for comparing the costs of alternate construction schemes for cut-and-cover tunneling in urban areas. It considers both the cost of construction and the cost of urban disruption, enabling the planner to choose that construction most effective for his particular requiremen
...
This volume contains summary cost analyses for 15 of the 176 study situations. The analysts give the unit costs of all labor, equipment, and material resources required to complete each project and are typical of the 176 cost estimates prepared for this study.
This report presents the results of a study to develop an analytical method for evaluating and optimizing cut-and-cover tunneling operations. The method is based on the results of a series of multiple estimates prepared by contractor type of basic resource estimating, rather than published unit prices. Major variables are type of structure, type of
...
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.