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 is a part of the continuing post-construction evaluation of a sand-asphalt-sulfur field trial on US 77 in Kenedy County, Texas. This evaluation is now eighteen months old. The report contains a brief description of background information, a statement of purpose, a summary of test results, and a brief analysis of the data. Very little di
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The conventional retarder speed control system is a misnomer. In particular, there are many system configurations one can put together with “conventional” hardware. Herein, we discuss several of these configurations, including: retarder types, poor man’s hump yard, and normal hump yard. The paper describes each of these configurations.
Presents MUNI's five year "master" plan for the programming of transit operations. It describes the existing system and what is anticipated for the future. It covers route design, operations, rolling stock requirements, and evaluates each on the basis of service standards for the system. It discusses ridership, funding, and regional transit integra
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Eleven private pilots (7 men and 4 women) were recruited and trained on the Multiple Task Performance Battery (MTPB), static and dynamic tracking of a localizer/glide slope instrument, a speech intelligibility test (single words with a background of aircraft noise), and use of the Intoxilyzer. The experiment comprised four test sessions (vodka, bou
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To assess the effects of propranolol on tolerance to rapid decompression, a series of experiments was conducted measuring time of useful function (TUF) in rats exposed to a rapid decompression profile in an altitude chamber. In other experiments TUF was measured for rats exposed to an oxygen/nitrogen gas mixture which produced a hypoxic condition e
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The cost of purchasing and operating a human centrifuge is substantial. Lower body negative pressure (LBNP) is considered an acceptable experimental substitute for the +Gz stress of the centrifuge. Since civil aviation pilots are usually subjected to +Gz stress in an upright seated position, an upright seated version of the supine LBNP box was deve
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Twelve air transport evacuations are reviewed. Injuries are discussed with emphasis on configurational and procedural contributing factors. Recommendations and information about possible methods of reducing injuries are provided.
United States. Congress. Office of Technology Assessment
1979-02-01
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This assessment of the automobile transportation system examines the automobile as a mode of personal transportation and considers issues and policy options pertaining to vehicles, highways, and related industries, services, and institutions. The assessment was authorized in February 1976 by the Technology Assessment Board, which approved a program
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United States. Congress. Office of Technology Assessment
1979-02-01
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PDF
The assessment deals with changes in the future use and characteristics of the automobile transportation system that are expected in the near term (by 1985) and those that might evolve over a longer period (through 2000 and beyond). The scope of the assessment is broad and includes not only automobiles but also highways, fuel supply and distributio
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Because the rolling behavior of a car with a V2 term is described by a non-linear differential equation, it had been assumed that no closed-form solution existed and that we would have to use a numerical integration procedure (e.g. Runge-Kutta) to solve the associated differential equation. Using a closed-form solution in PROFILE and SPEEDCON allow
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Previous studies on the effects of highway construction upon land use have focused mainly upon the effects of the construction of new highways. In view of a new emphasis upon upgrading and expanding existing facilities rather than building new ones, the need arises for information concerning the effects of such improvements upon land use. This repo
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Coating materials based on thermal setting polyester, thermal setting polyvinylidene fluoride, and air dry polyvinylidene fluoride have been found to be satisfactory coating materials for Overhead Guide Signs. The above three coatings also show excellent promise as materials for refurbishing deteriorated porcelain-enameled aluminum Overhead Guide S
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This report is a part of the continuing post-construction evaluation of a Sulphur extended asphalt field trial located on U. S. 69 near Lufkin, Texas. It contains a discussion of the background and methods of testing. In-situ results and laboratory test results on cores are presented in tabular form with respect to pavement age.
Herein we implement an approximate headway control algorithm similar to that outlined in Note 6, using some of the energy formulas described in Note 7. The algorithm is an iterative search procedure in which the highest exit velocity for the second car is calculated, subject to the constraint that sufficient headway exists at the point of switching
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A simple design procedure for a Dowty equipped yard has been developed. This procedure has been developed from information contained in several papers (see references at the end of the not), and may not coincide with Dowty Co. procedures, if any exist.
Yard configuration should have been determined with site selection, since different yard designs have their own space requirements. The pros and cons of three common yard layouts are presented, followed by a detailed presentation of Engineering criteria used for geometric design with the associated mathematical formulas.
The literature reviewed to date has revealed three basic speed control systems in use in foreign classification yards. These are: Clasp retarders using target-shooting logic, Hybrid of conventional retarders with a “car mover”, and Quasi-continuous control. A table of foreign systems, organized according to countries, with principal source referenc
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The purpose of this report is to more fully inform members of the Legislature, other interested parties, and the public about the major issues currently impacting the provision of public transportation services and mobile source-related air quality problems in California, keying on those issues under the jurisdiction of the Assembly Committee on Tr
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The operating philosophy of a railroad dictates the organization of its data system. ConRail (CR) claimed for example, that yard personnel mainly want a track list, whereas those outside the terminal mainly want to trace cars. At the Union Pacific (UP), data systems are subservient to the needs for running the railroad. For this reason, UP has gone
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This study of the Oregon State Highway Division's surfacing design procedures was undertaken to determine if the expected service is being obtained from current design practices, and to provide an comparison of different design alternatives to permit an optimum strategy to be selected. The economic analysis included full depth and staged constructi
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