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 Virginia Department of Highways and Transportation is one of seven state and federal agencies participating in a field evaluation of a stripping test method developed under NCHRP Project 4-8(3), "Predicting Moisture-lnduced Damage to Asphaltic Concrete". In the Virginia portion of this field phase of the project, an evaluation is being made of
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The quality and availability of aggregate for pc concrete stone varies across Iowa. Southwest Iowa is one area of the state that is short of quality aggregates.
This report is concerned with the review of data generated on projects let under the statistically oriented end-result specifications (ERS) on asphaltic concrete and Portland cement concrete. The review covered analysis of data for determination of price reduction for deficient material and overall variability of data.The analysis and evaluation in
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The study investigated the feasibility of using a coarse aggregate in the S-5 asphalt mixes. Virginia Department of Highways and Transportation specifications were adhered to with the exception of incorporating into the mix a small percentage of +1/2" material. A #78 aggregate was selected from three quarries in Virginia and substituted for the #8
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This report describes the sources of state monies that make up the State Highway Construction and Maintenance Fund. The report shows that a total of $521,731,812 was collected by five state agencies during fiscal year 1978-1979. The Department of Motor Vehicles collected 91% of the revenue, or approximately $475,782,127; the Department of Highways
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An evaluation was made of the need for changes in Virginia law concerning headlamp usage during periods of dusk and dawn and at times of limited visibility. At the present time motorists are required to turn on the headlamps of their vehicles one-half hour after sunset and to leave them on until one-half hour before sunrise. In addition, headlamps
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The possibility of using neoprene pads as an alternate to sulfur mortar for capping concrete specimens subjected to compression tests was investigated. In preliminary tests to determine the feasibility of the investigation, two batches of concrete were prepared. Subsequently, in the main part of the investigation 8 batches of concrete were made. Co
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The research reported here was undertaken in response to a request by the Legislature of Virginia that a study be conducted of state imposed taxes and fees on motor carriers of passengers, the purpose being to determine the effects a reduction in one or more of these taxes would have on state revenue and on the carriers' ability to continue to offe
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At the request of the Division of Litter Control of the Department of Conservation and Economic Development, the Research Council has initiated a litter survey program at approximately 25 sites on the state highway system. The purpose of this program is to determine changes in the quantities of litter generated at these sites. The purpose of this i
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