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 document represents a collection of various reports concerning the protective capability of passenger and crew oxygen breathing equipment and specialized devices and concepts against smoke and toxic gases produced by aircraft fires.
Data collected on 111 interstate highway projects in Virginia were analyzed by multi-regression analysis and the rating coefficient for each type of distress determined. By this means, the total pavement distress and, hence, the maintenance rating of each pavement was obtained. The types of distress that were found to influence the maintenance rati
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This study was intended to evaluate the air void characteristics of concrete in an attempt to identify, quantitatively or semi-quantitatively, different types of voids and to predict their influence on strength and durability. At the outset, it was anticipated that total air contents and water-- cement ratios of concrete mixtures would reflect the
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This research project was conducted in order to compare the existing procedure of zinc coating by hot-dip galvanizing with the other zinc coating systems of painting and electroplating.Hardware coated by these processes was exposed to varied laboratory tests. Based upon the results of these tests, the protection afforded by the GS grade of electrop
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The need for a suitable method of designing the thickness of overlays and predicting the performance of the overlaid pavement has recently been recognized. The AASHTO Road Tests included studies on 99 overlays, but they failed to produce conclusive results and hence provided no guidance for overlay designs. In the present investigation the raw data
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Highway Safety Program Standard 5, Driver Licensing, issued by the U. S. Department of Transportation requires the states to test applicants for a renewal of their operator's license on rules of the road at least once every four years. The cost of additional manpower to administer and score these tests, the expense of expanding existing facilities
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In response to an objection by interested individuals to the fact that Virginia law classifies three-wheeled, motorized invalid vehicles as motorcycles and subjects them to all registration, safety inspection, and operator requirements applicable to other vehicles in that category, the Highway Safety Division of Virginia requested that the Virginia
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The study reported here was performed to extend the body of knowledge concerning the use of internally sealed concrete to protect bridge deck reinforcing steel. A laboratory determination of the properties of the wax and concrete used and a field evaluation of a method of heat treatment were made. The experimental structure was a three-span bridge
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The portable precast concrete traffic barrier is used to separate high speed vehicular traffic and construction activities. However, since there was a lack of information on the barrier's performance in a construction zone environment, officials of the Virginia Department of Highways and Transportation requested that the Virginia Highway and Transp
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Concrete mixtures incorporating fly ash were investigated as possible alternatives to mixtures utilizing Type II cements. The mixture characteristics considered were strength, resistance to freezing and thawing and sulfates, heat of hydration, and volume stability. Two testing programs were undertaken. In the first program control mixtures were pre
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Beginning with the oil embargo of 1973-74, highway lighting and particularly continuous lighting on freeways became one of the first items to be cut back to conserve energy and revenue. During this period of energy shortage, considerable lighting was turned off in Virginia and in particular the 13.8 km (8.57 mi) section of continuous lighting on I-
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The report was prepared in response to a request by the Legislature of Virginia, through Senate Joint Resolution 76, that a study be conducted on the desirability and feasibility of using alternative methods of financing not presently available to support improvements in transportation facilities in Virginia. The report showed that, under reasonabl
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Parking facilities are a basic part of the modem community's transportation system. They profoundly influence economic viability, and consequently are a major concern to public administrators, businessmen, shoppers, workers, and in fact to everyone who drives an automobile. Because of its importance, parking has been the subject of numerous papers,
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Designers of rail hump yards traditionally go through a tedious, long manual process to optimally design the hump grades and retarder placements. This design process involves checking velocities and headways of a worst-case sequence of cars to ensure that proper values of the variables can be maintained on the gradient. This paper presents a comput
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