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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.

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Showing 32741 - 32760 of 35440 results
  • Engineering Economy and Energy Considerations Correction of Bleeding Flushing Surfaces
    Engineering Economy and Energy Considerations: Correction of Bleeding (Flushing) Surfaces
    Finn, F. N. ;
    Epps, J. A.
    1981-06-01 | PDF
    The purpose of this report is to discuss the occurrence and consequences of bleeding pavements, methods for correction of bleeding pavements and a procedure for evaluation of corrective alternatives. For purposes of this report, bleeding (or flushing) is the presence of excess asphalt, or a film of asphalt on the pavement surface.
  • Safety Treatment of Roadside ParallelDrainage Structures
    Safety Treatment of Roadside Parallel-Drainage Structures
    Ross Jr, Hayes E. ;
    Hirsch, T. J.
    1981-06-01 | PDF
    The purpose of the research was to develop traffic-safe end treatments for parallel-drainage structures that would not appreciably restrict water flow. Guidelines or warrants for use of the end treatments were also developed. Parallel-drainage culverts are used to convey water under driveways, side roads, or median crossovers. Preliminary designs w ...
  • Analysis of routine traffic count stations to optimize locations and frequency final report
    Analysis of routine traffic count stations to optimize locations and frequency : final report.
    Shah, S. C. ;
    Hirschmann, J. J.
    1981-06-01 | PDF
    This report describes a grouping of statewide permanent and key traffic counters on the basis of their geographic variations in traffic flow. Several factors were considered including the distance between clusters and urban versus rural areas.Traffic counts for a 3-year period were grouped into clusters by highway functional class for each individu ...
  • The Future of Wheat Transportation to the Pacific Northwest From North Dakota and Montana
    The Future of Wheat Transportation to the Pacific Northwest From North Dakota and Montana
    Griffin, Gene C.
    1981-05-01 | PDF
    The Pacific Northwest ports serve as terminal markets and export locations for significant amounts of hard red spring and hard red winter wheat produced in North Dakota and Montana. The wheat movements to the PNW from this origin territory involve several modes; rail, truck and barge. What modes or combinations will dominate in the future movement ...
  • National Urban Mass Transportation Statistics First Annual Report Section 15 Reporting System May 1981
    National Urban Mass Transportation Statistics: First Annual Report Section 15 Reporting System [May 1981]
    Morin, Stephen J.
    1981-05-01 | PDF
    This report summarizes the financial and operating data submitted annually to the Urban Mass Transportation Administration (UMTA) by the nation's public transit operators, pursuant to section 15 of UMTA Act of 1964, amended. The report consists of two sections: Section 1 contains industry aggregate statistics only, while Section 2 contains detailed ...
  • Effects of Roadway Improvements on Adjacent Land Use An Aggregative Analysis and the Feasibility of Using Urban Development Models
    Effects of Roadway Improvements on Adjacent Land Use: An Aggregative Analysis and the Feasibility of Using Urban Development Models
    Rollins, John B. ;
    Memmott, Jeffery L.
    1981-05-01 | PDF
    The effect of improving existing urban roadways on surrounding land use is an important consideration in highway agency decisions regarding roadway improvements. Such decisions should consider the economic impact of proposed improvements. In an effort to identify the kinds of effects which urban roadway improvements have on surrounding land use ove ...
  • Evaluation of questionnaire on pay adjustment factors for asphalt concrete mixtures
    Evaluation of questionnaire on pay adjustment factors for asphalt concrete mixtures.
    Moore, Richard M. ;
    Wilson, James E.
    1981-05-01 | PDF
    In an effort to collect information on the status of quality control procedures and the use of pay adjustment factors, a questionnaire was distributed to all state agencies, the District of Columbia, and the Federal Highway Administration. Each agency was asked to respond to questions describing their current method for acceptance or rejection of a ...
  • Impact of variation in materials properties on asphalt pavement life evaluation of a questionnaire
    Impact of variation in materials properties on asphalt pavement life : evaluation of a questionnaire.
    Moore, Richard M. ;
    Wilson, James E.
    1981-05-01 | PDF
    In an effort to collect information on the status of quality control procedures and the use of pay adjustment factors, a questionnaire was distributed to all state agencies, the District of Columbia, and the Federal Highway Administration. Each agency was asked to respond to questions describing their current method for acceptance or rejection of a ...
  • Evaluation of flexible plastic glare shield in Oregon
    Evaluation of flexible plastic glare shield in Oregon.
    Anderson, Judy ;
    Beecroft, Gordon
    1981-05-01 | PDF
    This experimental features project was approved by the Department of Transportation, Federal Highway Administration, on July 11, 1973. A four-mile section of flexible plastic glare screen was installed on top of the existing concrete median barrier on the Baldock Freeway in September of 1974. This is a six-lane, high-volume section with lineal illu ...
  • Feasibility of development of a nuclear density gage for determining the density of plastic concrete at a particular stratum final report
    Feasibility of development of a nuclear density gage for determining the density of plastic concrete at a particular stratum : final report.
    Iddings, Frank A. ;
    Melancon, James
    1981-05-01 | PDF
    Development of a nuclear density gage for determining the degree of consolidation of plastic concrete in selected horizontal layers was determined to be feasible. A commercially available, with some modifications, two-probe density gage (detector in one and source in the other) provided the most reliable laboratory results and is practical for fiel ...
  • An analysis of civil aviation propellertoperson accidents 19651979
    An analysis of civil aviation propeller-to-person accidents : 1965-1979.
    Collins, William E. ;
    Mastrullo, Angelo R.
    1981-05-01 | PDF
    The interest of manufacturing, governmental, and safety personnel using paint schemes on propeller and rotor blades is based on improving the visual conspicuity of those blades when they are rotating. While propeller and rotor paint schemes may serve to reduce the number of fatalities and injuries due to contact with a rotating blade there is littl ...
  • Factors related to the welfare of animals during transport by commercial aircraft
    Factors related to the welfare of animals during transport by commercial aircraft.
    Hanneman, Gerald D.
    1981-05-01 | PDF
    This report contains a brief history of the transportation of animals by air. It describes how various organizations contributed to the safe and humane care of animals during transport and how regulations to insure safer shipping conditions were developed by the United States Department of Agriculture. The two classes of cargo spaces in large aircr ...
  • Improving the crashworthiness of general aviation aircraft by crash injury investigations
    Improving the crashworthiness of general aviation aircraft by crash injury investigations.
    Kirkham, William R.
    1981-05-01 | PDF
    An accident investigative research program has correlated injuries to aircraft occupants with the accident severity and structural changes in the crash. Findings brought to the attention of aircraft manufacturers have led to specific aircraft being made more crashworthy. Following the finding of a failure in a shoulder harness attachment the manufa ...
  • Selected Technical and Economic Comparisons of Synfuel Options
    Selected Technical and Economic Comparisons of Synfuel Options
    E.J. Bentz & Associates
    1981-04-01 | PDF
    This study is a comparative technical and economic assessment of selected synfuel technologies. It contains papers written for Office of Technology Assessment (OTA) to assist in preparation of the report "Increased Automobile Fuel Efficiency and Synthetic Fuels: Alternatives for Reducing Oil Imports." A key purpose of this study is to provide techn ...
  • Field Evaluation of Flashing Arrowboards at Freeway Work Zones
    Field Evaluation of Flashing Arrowboards at Freeway Work Zones
    Faulkner, Michael J. S. ;
    Dudek, Conrad L.
    1981-04-01 | PDF
    This report documents research conducted in the evaluation of flashing arrowboards when located in advance of lane closure work zones. The effects of advance arrowboard placement were compared to the effectiveness of the arrowboard placement normally used by District 14 of the SDHPT. The research indicates that arrowboard placement in advance of th ...
  • Sight Distance Requirements at Lane Closure Work Zones on Urban Freeways
    Sight Distance Requirements at Lane Closure Work Zones on Urban Freeways
    Richards, Stephen H. ;
    Dudek, Conrad L.
    1981-04-01 | PDF
    This report presents the findings of field studies conducted to evaluate the effects of sight distance to lane closures at urban freeway work zones. These studies investigated the interaction of sight distance with traffic volume and various work zone traffic control features (e.g., advance signing and arrowboards). The studies were/conducted at 16 ...
  • Traffic Capacity Through Work Zones on Urban Freeways
    Traffic Capacity Through Work Zones on Urban Freeways
    Dudek, Conrad L. ;
    Richards, Stephen H.
    1981-04-01 | PDF
    This report summarizes findings of capacity studies conducted at urban freeway maintenance and construction work zones in Houston and Dallas. Studies were conducted on 5-, 4-, and 3-lane freeway sections. The results indicate that the per lane capacities are affected by the number of lanes open during the roadwork. For example, the average capacity ...
  • Fatigue in Flight Inspection Field Office FIFO flight crews
    Fatigue in Flight Inspection Field Office (FIFO) flight crews.
    Melton, C.E. ;
    McKenzie, J.M.
    1981-04-01 | PDF
    Studies related to FIFO aircrew stress and fatigue were carried out at seven FIFO's in the Continental U.S. Forty-one men served as subjects and all crew positions were presented. Each crewmember was studied during flight activities and during office-based activities.Generally, crews were in travel status during flight inspection activities and awa ...
  • Agerelated differences in complex monitoring performance
    Age-related differences in complex monitoring performance.
    Thackray, Richard I. ;
    Touchstone, R. Mark
    1981-04-01 | PDF
    The present study examined the effect of age on the ability to sustain attention to a complex monitoring task. The visual display was designed to resemble an air traffic control radar display containing alphanumeric symbols. Subjects in age groups 18-29, 40-50, and 60-70 years were tested over a 2-hour session. Sixteen symbols appeared on the scree ...
  • Physiological biochemical and performance responses to a 24hour crash diet
    Physiological, biochemical, and performance responses to a 24-hour crash diet.
    Higgins, E. Arnold ;
    Mertens, Henry W.
    1981-04-01 | PDF
    Twelve overweight male subjects were evaluated once on a normal diet and once on a 24-h crash diet and (low calorie liquids only). Experiments were 1 wk apart. During 2 1/4-h complex performance tests given at the end of the diet period, subjects breathed an O2/N2 gas mixture equivalent to 12,500 ft.There were no significant physiological and bioch ...
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