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.
It has been the policy of the Federal Aviation Administration to medically certify individuals, for a variety of flying privileges, who also have medical deficiency or disease, provided it can be determined that such action does not comprise air safety. During recent years, for example, standards have been relaxed with respect to contact lens use a
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This study describes seasonal patterns of grain marketing in North Dakota. Causal relationships are being evaluated and will be reported elsewhere. A secondary objective is to evaluate changes in the seasonal pattern of marketing since 1967.
Reported in this bulletin is an analysis of the influence of seasonal rail rates on the movement of wheat, transport modes, and on location of storage facilities. Specific objectives were to describe the historical conditions associated with seasonal rail grain rates in North Dakota; to check for trends and seasonality patterns in grain flows from
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Experimental and theoretical investigations have been made of meteorological and air quality conditions near a broad range of complex roadway configurations. These are described, and some new insights into the interrelationships among traffic, meteorology, and configuration are discussed. The development of a new and versatile dispersion model, cal
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A manual user-oriented methodology has been developed for estimating air quality conditions at each of a wide variety of simple and complex roadway configurations. Guidelines are presented in four parts for the evaluation of air quality conditions at alternative roadway configurations. The first part presents a background discussion of principles o
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The data and results presented in this report are complementary to those reported earlier in m Technical Report 1060-1, Costs of Public Transportation in Texas, 1973-1977. The objective of the study was to analyze the types and sources of revenues available to transit systems in Texas; trends in those revenues; and the amounts and sources of financ
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The B-1 TRIDAQS (Travel Information Data Acquisition System) is a unit for recording travel time information in a floating vehicle. The unit is highly portable with easy transfer from vehicle-to-vehicle, and virtually independent of any special equipment installations that would limit the use of the unit to a specific vehicle. The unit is easily op
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This report summarizes the findings of an evaluation of the 1979 Texas law (V.C.S., Sec. 73.A.) which requires frontage road traffic to yield right-of-way to freeway ramp traffic. The law was enacted to encourage statewide uniformity in right-of-way assignment at frontage road-ramp intersections. It affected traffic control at approximately 2,700 r
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STAI scores of adult men and women within the age range of 25 through 59 years were generally equal to or slightly less than scores of the college undergraduate normative group. This suggests that the previous use of undergraduate norms to evaluate A-Trait and A-State scores of ATCSs did not underestimate the levels of work-related stress associate
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particular river reach, but also on the behavior of the entire fluvialsystem of which it is a part. Rivers are complex landforms. A simple andstraight forward approach to the identification of river hazards is not alwayspossible. A complete evaluation of hydraulic hazards cannot be solely basedon on-site hydrologic, hydraulic and geomorphic factors
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"Aggradation and degradation are long-term changes in stream channel elevation. The effects of gradation changes are not the same as local scour or erosion because they extend greater distances along the stream-bed. Degradation is a more common problem than aggradation and in general, has a more severe impact on highway crossings. Although gradatio
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This study is to determined by physical, chemical, and biological means, the effects of bridged highway construction techniques on water quality in wetlands. Water quality was monitored before, during, and after construction. The data shows the increase in pollution that occurred during construction. The areas where construction has been completed
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This paper gives a brief description of the formation of the exempt motor carrier industry and its relationship to railroads, as well as problems in that industry.
This manual has been prepared for use by highway department personnel to evaluate highway runoff. It contains detailed procedures for establishing and conducting a monitoring program and evaluating the collected data. Step-by-step procedures are delineated and following these steps should help in developing a simple and straight-forward method whic
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This report documents the development and application of a simple predictive procedure (model) for determining the runoff quantity and quality from highway systems based on the data gathered from 5 monitoring sites around the country. Equations for 3 highway site types were developed to predict runoff volume and pollutant wash-off coefficients for
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This report relates to the identification and quantification of the constituents of highway runoff. It includes the details of monitoring site selection, field monitoring procedures, analysis of accumulated data, conclusions, significant findings and limitations. A total of 159 storm events were monitored at six sites between Spring of 1976 to Sept
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This state-of-the-art report documents the constituents of highway runoff and their pollutional effects. It provides a general background about the problem, its recognition and the emerging emphasis to address the problem and its solutions. It discusses highway design and drainage characteristics and their relationship to runoff quantity. An extens
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The Data Storage Program (DSP) was developed as part of a FHWA-DOT Research and Development project to determine the characteristics of highway runoff. The data collected during the study is readily available to interested parties on magnetic tape with access provided by DSP. DSP was developed to: 1. Retain a large quantity of field generated data
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This report documents the research conducted during one phase of a research project conducted by the Texas Transportation Institute entitled, "Evaluating Urban Freeway Guide-Signing". The research was sponsored by the Texas Department of Highways and Public Transportation in cooperation with the U.S. Department of Transportation, Federal Highway Ad
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The State Optimal Fund Allocation problem is presented. The problem is modeled as a Nonlinear Knapsack Problem, and the solution methodology uses the concepts of dynamic programming techniques. An example problem with five Highway Districts is formulated and solved using a computer program developed for that purpose. There are 11, 12, 17, 14, and 1
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