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.
Manual computations and computerized applications of logit models are described. The models demonstrated reflect travel behavior concerning express bus-fringe parking transit. The specific travel issues addressed include the basic automobile vs. express bus transit choice, model, transferability between two study areas, submodal split, and n-dimens
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The most common types of temporary sediment control structures used by the Virginia Department of Highways and Transportation are straw barriers and silt fences. Based on observations made in Virginia and other parts of the nation, filter barriers have not been as effective as many users had hoped they would be. Different researchers have found tha
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Albemarle County, formed from Goochland in 1744, is fortunate in having preserved in its records three volumes of surveys made by the surveyors of the county between 1744 and 1853. In a sense, Albemarle County's good fortune extends to several other counties in central Virginia for they were at one time partially or wholly within the confines of th
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The FOLLOWING TOO CLOSELY (FTC) MONITOR system is an experimental device designed to measure vehicle gaps at a point along the highway and to advise the motorist, by means of a flashing message on a sign, that he is following the car in front of him too closely. On October 31, 1974, ten FTC monitors were installed at four sites on a 6-mile 4-lane u
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This report provides a detailed explanation of the inner workings of the computer program AIRPOL-4A, a computer model for predicting the impact of highway generated air pollution. The report is intended to serve both as a supportive document for AIRPOL-4A and as a detailed road map of the program should modifications be required in the future.
The report illustrates a procedural method for planning express bus-fringe parking transit services - a method built upon the findings from previous research, including disaggregate travel choice models and planning guidelines. The methodology addresses the tasks of site selection, demand analysis, and site evaluation. The appropriateness of this s
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Compression tests on nine reinforced concrete rectangular columns subjected toconstant thrust and biaxially eccentric moments were conducted at the off-campusresearch facility of The University of Texas, The Civil Engineering StructuresLaboratory at Balcones Research Center.The complex nature of biaxially eccentric thrust and biaxially eccentricdef
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The incidence of motion sickness in a large (N = 3,618) college population was determined by means of a questionnaires. Significantly greater proportions of men than women had low susceptibility scores; significantly greater proportions of women had high susceptibility scores. Comparisons of MSQ scores were made with other self-assessments, age cha
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This report present some of the technical background necessary for understanding the aeromedical importance of sickle-cell disease and the sickle-trait carrier, whose erythrocytes contain mixtures of hemoglobin S and normal hemoglobin A. This carrier state (type AS) is not limited to Negroes; it has been found, with lower frequency, in people exhib
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The influence of approximately 34 and 55 h of sleep deprivation on performance scores derived from manually tracking the localizer needle on an aircraft instrument was assessed under both static (no motion) and dynamic (whole-body angular acceleration) laboratory conditions. In each of two experiments, 20 young men were equally divided into groups
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This study provides comprehensive data reflecting pertinent denial rates with respect to the medical and general attributes of those airmen denied medical certification in calendar years 1973 and 1974. The study provides such descriptive epidemiologic data as age, sex, occupation, class of certificate applied for, total flying time, and cause-speci
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The effects of Reynolds number and corner radius on two-dimensional flow around octagonal, dodecagonal and hexdecagonal cylinders were investigated. All models were studied at at least three model-relative wind orientations to determine the effect of angular alignment. In general it was found that the greatest drag coefficient was experienced with
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A prepared dry sand standard representing zero moisture content was found to yield nuclear moisture readings similar to those obtained on a magnesium density block. Therefore, the magnesium block was adopted in place of the sand standard for use as a zero moisture calibration standard. Magnesium sulfate was mixed with dry sand at two ratios to yiel
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Reduced visibility on the highway due to adverse weather conditions results in an inability of motorists to readily observe pavement markings, signs, and vehicles. The condition that presents the most serious restriction is fog, although rainfall during the night frequently creates serious visibility problems. Because of the ability of reflex refle
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Since the early 1950's, highways have been designed in Virginia to carry 8-foot wide vehicles on 12-foot lanes. Extralegal width vehicles impose detrimental operational effects and safety hazards on other highway users. To minimize the hazards, the Highway and Transportation Commission places restrictions on the movement of all extralegal size vehi
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