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.
The magnitude of potential highway user benefits and costs resulting from proposed highway improvements must be estimated with a reasonable degree of accuracy for highway agencies to make rational decisions in the public interest. There are procedures, some of which are computerized, in use or available for use to estimate user benefits and costs.
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1979-01-01
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U.S. Department of Transportation Annual Reports
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PDF
Submitted in compliance of Section 11 of the Department of Transportation Act, the eleventh annual report of the Department of Transportation accounts the Department's activities during Fiscal Year 1977.
Current retarder control algorithms consider only the “characteristics” of the car to be controlled in determining how to control the car. This type of control policy is simple to implement, however its performance is conservative since it is based on either nominal or worst-case assumptions about what the car ahead is doing. Herein we attempt to c
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The purpose of this informal working note is to describe basic requirements on railroad yard geometric design. This yard geometric design document has been derived from conversations with yard design experts in the U.S. In the future this note will be rearranged and combined with the previous working note on yard hardware.
This note reports a preliminary statistical study of rolling resistance data from ConRail’s Elkhart, Indiana yard October 25 and 26, 1978 by Messrs. Jim Wetzel, Jack Delancy and Gerald Brubaker of ConRail. The data consists of three separate test runs of cars switched over the hump and rolled into a single destination class track. The analysis cons
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Transit is seen by insurers as a risk with high loss potential. Since people are transported in large numbers, a single accident may yield many claims. One solution to this insurance situation that has been employed by transit system operators is to assume some of the risk of potential loss themselves. The handbook introduces risk management to tra
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The effects of de-icing salts on concrete and reinforcing steel is well documented, and efficient methods of protection from the penetrating chloride ions have long been sought. Concrete bridge decks need the protection, and waterproofing the concrete appeared to be a possible answer to this problem. With the development of waterproof membrane syst
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The main goal of the Study was to determine the nature and extent of health changes in the Air Traffic Controllers and by what characteristics these health changes might be predicted.
The objective of the study was to evaluate a pneumatic pipeline system for muck haulage from a tunnel excavated by a tunnel boring machine. The system was comprised of a muck preparation unit, solids feeder and air blower, telescoping pipes and 500 feet of 10- inch diameter pipe. The system transported up to 100 tph of simulated tunnel muck with ma
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This fifth report provides guidance on geological investigations, durability classification of shales, design features, and construction procedures unique to compacted shale embankments for highways. Guidance is also given on techniques for evaluating existing shale embankments and remedial treatment methods for distressed shale embankments. Index
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The purpose of this study was to ascertain if residential properties subjected to highway noise levels in excess of FHWA Guidelines experienced a diminution in-value. Both signle family homes and apartments in close proximity to Interstate highways, and fronting on major arterial collector roads were compared to similar units in the same vicinity n
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This note discusses preliminary thoughts on incorporating the logic to represent a conventional retarder yard system into PROFILE. PROFILE is the SRI-developed hump yard profile simulation model and was described in the Appendix to Informal Note #4. Currently, PROFILE does not simulate the logic by which the retarder system determines how much ener
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The goal of this study is to provide information that will be useful in reducing costs of future computerized urban traffic control systems. The final report provides such information in the form of tutorial and reference material, cost computation procedures, and an example of a communication subsystem specification. The report consists of two vol
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This note discusses preliminary thoughts on modifying the SRI developed hump yard profile simulation, PROFILE, to simulate the Dowty retarder system. This simulation model has the capacity of simulating the roll of individual cars from the hump into the classification track, including the operation of the conventional retarder system. This model is
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The goal of this study is to provide information that will be useful in reducing costs of future computerized urban traffic control systems. The final report provides such information in the form of tutorial and reference material, cost computation procedures, and an example of a communication subsystem specification. The report consists of two vol
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This note documents a simple sensitivity analysis showing system response, as measured by distance headway, as a function of rolling resistance. Included in the response is the intervention effect of a typical conventional retarder logic system. The computer simulation runs used the SRI-developed PROFILE simulation model and were based on the exist
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In February 1969, as the frequency of hijacking of U.S. air carrier aircraft was rising to an all-time high, the Federal Aviation Administration established a multi-disciplinary Task Force on Deterrence of Air Piracy. The work of the Task Force in developing an airline passenger pre-boarding screening system and other actions to deter hijacking is
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This report represents a continuation of analyses concerned with the patterns and methods of distributing grain from North Dakota. The collection and compilation of this type of data began in 1956-57. The objective of this report, like prior reports, is to provide the necessary data base for identifying trends in the distribution of grains and oils
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