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 policy covers. initial placement, adjustment, relocation andreplacement of utility facilities in, on., above or below all highwayright of way over which the Iowa State Highway Corninission exe:tcii:lescont.rol of access. It embodies the basic specifications and standardsneeded to insure the safety of the highway user and the integrity ofthe hi
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Hospitals are major activity centers. In the United States they employ 2.9 million workers supported by nearly one million volunteers.' Daily they attract 15 million automobile trips generating about 55 million vehicle miles of travel. Affluence, advances in medicine and surgery, the advent of medical insurance and governmental health programs, and
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The purpose of the study was to define the current traffic records system of the Commonwealth so as to identify deficiencies as specifically as possible; to suggest changes to upgrade the system to meet current and projected demands at maximum efficiency and minimal costs; and, finally, to determine the feasibility of the proposed system.
Planning for maintenance resurfacing in the Virginia Department of Highways is becoming an increasingly complex and important function. Increasing highway mileage and traffic volumes, as well as other requirements such as maintaining a minimum skid resistance, require that many variables be considered in order to most efficiently allocate the maint
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In fiscal year 1973 the NHTSA required the states to prepare and submit a new "State Comprehensive Plan" to replace the base year study and implementation plan submitted in November 1967. The comprehensive plan is a four-year estimate and projection of the Commonwealth's planned highway safety programs. It contains an evaluation of the highway safe
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The basic consideration in evaluating subgrade moisture conditions under pavements is the selection of a method of determining moisture contents that is sufficiently accurate and can be used with minimal effort, interference with traffic, and recalibrations. In the present study, the electrical resistance method and a nuclear method were tried, and
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The Virginia Department of Highways has many data systems, and among them highway locations are referenced in various ways. While each of the several present systems is useful for its primary intended purpose, the ability to automatically relate the systems through the use of a common locator method would yield much greater benefits. In fact, the f
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In order to establish priorities for allocating highway funds available for safety improvements, an investigation was made of a method for ranking the state's counties according to their accident histories. Million vehicle miles traveled, registered vehicles, and registered vehicles times road miles were used to normalize the counties' accident sta
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The Virginia Highway Research Council was asked to search for ways of making travel safer on fogbound highways. All literature obtainable on fog research was reviewed and after an in-depth review of fog abatement techniques it became apparent that neither technology nor hardware had advanced to the degree that it was feasible for highway usage. The
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Pavement inset lights were installed in both edgelines of the eastbound lanes of I-64 in Augusta County from milepost 27.90 to milepost 28.40. The lights were found to be a definite aid.
The three most widely used current methods for detecting deterioration of concrete bridge decks associated with spalling were compared with a visual inspection of the reinforcing steel and to each other in order to determine the degree of agreement among the methods. The three methods are known as the Chain Drag Method, Measurement of Corrosion Pot
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Cold weather paving specifications were developed from work by Corlew and Dickson, who used a computer solution to predict the cooling rate of bituminous concrete. Virginia had used a minimum atmospheric temperature as a criterion; however, it was evident that other factors had a significant effect, so the computer solution was considered as a poss
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The subject of this report is an air quality prediction model for highways, AIRPOL Version 2, July 1973. AIRPOL has been developed by modifying the basic Gaussian approach to gaseous dispersion. The resultant model is smooth and continuous throughout its entire range, which adds mathematical credence to its applicability. AIRPOL has the capability
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A study of cores from both the concrete and subbase of the cracked pavement, along with an examination of the in-place subgrade and subbase, suggested that there was no structural damage to the pavement except for the cracking. The situation was aggravated by the poor lateral drainage, which was being corrected by the excavation of shoulder materia
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The Shirley Highway Express-Bus-on-Freeway Demonstration Project was initiated to test the hypothesis that the provision of rapid and convenient bus service over an exclusive lane would attract significant numbers of automobile passengers. Such a diversion would improve the passenger movement and relieve the congestion of the facility, thus resulti
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This report describes the various parameters that must be considered in evaluating highway noise barriers. The information presented is based on the current state of the art and covers the effectiveness, designs, materials and costs of barriers.
In recent years, the investigation of the effects of highway improvements on the social structure existing in the chosen highway corridor has become a necessary part of the transportation planning process. The environmental impact statement, as required by the 1970 Federal Aid Highway Act, stipulates that the social effects of the proposed highway
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An investigation was conducted of the structural behavior of a flexural member composed entirely of glass-fiber reinforced polyester resin. Three experimental girders were fabricated and load-tested in the laboratory. The physical characteristics of the members included a triangular cross section, a top flange built up with preformed shapes, a comb
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