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 objective of this study is to determine if neutron activation analysis technique, developed under Research Project 70-1ST, can be used to determine the shell content of a sand-shell mixture.In order to accomplish this objective, samples of sand and shell were obtained from different sources. The material sampled was artificially blended in the
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The purpose of this project is to determine the acoustic and economic effectiveness of resilient wheels, damped wheels, wheel truing, and rail grinding for reducing wheel/rail noise on urban rail transit systems. The project consists of a six-phase series of field tests being performed on the Southeastern Pennsylvania Transportation Authority Syste
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The State Department of Highways and Public Transportation and the Texas Transportation Institute conducted a five-month study to determine the uses and analysis of traffic accident data. An additional objective was to evaluate the present accident data reporting system and to determine the capability of the current system and proposed systems to s
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Thirty-three big-rig truck operators from 20 states will challenge the U.S. Department of Transportation in a fuel economy competition at the Transportation Research Center.
The lethality of methamidophos, a phosphoramidothioate, to rats (i.p. LD50, 15 mg/kg), is similar to that of such potent organophosphate compounds as parathion and paraoxon. Certain distinctive features of its chemical structure, and reported failure of cholinesterase inhibited with methamiodophos to reactivate spontaneously in insects, prompted th
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This research focused on the application of finite element computer programs to the transient heat conduction and static stress analysis of bridge-type structures. The temperature distribution is assumed to be constant along the center-line of the bridge but can vary arbitrarily over its cross section. A computer program, TSAP, was developed for th
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This asphalt concrete recycling project, the first attempted by the Washington State Department of Transportation, seems so far to be very successful. The project looks good from a standpoint of economy, energy use, conservation of natural resources, feasibility of construction, and from an evaluation of the test data obtained to date. Certain pitf
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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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The TEXAS Model for Intersection Traffic is a microscopic simulation package describing the behavior of individual driver-vehicle units at isolated intersections. This report deals with two applications of this model, namely determining the capacity of an intersection and analysis of warrants for traffic signal control. Service volume has been rela
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The Department of Transportation and the Environmental Protection Agency announce a joint effort to help cities improve air quality through transportation planning.
The costs of civil air transport emergency evacuation demonstrations using human subjects have risen as seating capacities of these aircraft have increased. Repeated tests further increase the costs and also the risks of injuries to participants. A method to simulate such evacuations, by use of a computer model based on statistics from measured com
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The results of test programs conducted by the Protection and Survival Laboratory to investigate the performance of prototype or operational seating and restraint systems relative to their ability to provide protection against crash injury and to investigate the performance of anthropomorphic dummies in the dynamic environment are reported. The data
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Louisiana. Department of Highways. Research and Development Section
1978-06-01
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The present procedure for estimating construction bid item cost makes use of the quarterly weighted average unit price report coupled with engineering judgement. The limitation to this method is that this report format provides only the lowest bid data distributed over the entire three-month period. Furthermore, it fails to recognize the dependency
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This study was conducted to investigate the behavior of post-tensioned polymer-impregnated concrete (PIC) beams. Three major areas of behavior were studied by experimental and theoretical analyses: flexure, shear, and time-dependent deflections. Test results were compared to values calculated according to ACI Standard 318-71 and to results from num
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This report is the first of a two volume series titled, "Highway Air Quality Impact Appraisals-Volume I, Introduction to Air Quality Analyses, and Volume II, Guidance for Highway Planners and Engineers." These two reports are intended to provide transportation planners and engineers with guidance on how to perform air quality analyses. Volume I pre
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This report is the second of a two volume series titled, "Highway Air Quality Impact Appraisals--Volume I, Introduction to Air Quality Analyses, and Volume II, Guidance for Highway Planners and Engineers." These two reports are intended to provide transportation planners and engineers with guidance in how to perform air quality analyses. This volum
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This paper includes moisture-density-strength screening tests performed on several additional chemicals and an evaluation of the standard AASHTO T-99 moisture-density tests results performed on soil specimens prepared under varying conditions of drying, pulverization, and re-use. Theory and applicability of project use of the Iowa K-Test for determ
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Soil is man's cheapest and most abundant construction material, and compaction is the most widely used method of strengthening soils and making them suitable for construction uses. The technology of compaction, while improving, remains largely in a trial and error state, emphasizing the basic moisture-density relationships discovered by R.R. Procto
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