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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 32861 - 32880 of 35440 results
  • Field Tests and New Design Procedure for Laterally Loaded Drilled Shafts in Clay
    Field Tests and New Design Procedure for Laterally Loaded Drilled Shafts in Clay
    Bierschwale, Mark W. ;
    Coyle, Harry M.
    1981-01-01 | PDF
    Lateral load tests were conducted on three drilled shafts in predominantly CH soil. Shaft sizes varied from 30 in. (760 mm) to 36 in. (910 mm) in diameter and 15ft. (4.6 m) to 20ft. (6.1 m) in length. Loads were applied incrementally at a point 2.6 ft (790 mm) above the ground surface. Duration of the tests was 57, 24 and 205 days. Measurements of ...
  • Thirteenth Annual Report of the US Department of Transportation 1979
    Thirteenth Annual Report of the U.S. Department of Transportation: 1979
    United States. Department of Transportation
    1981-01-01 | U.S. Department of Transportation Annual Reports | PDF
    Submitted in compliance of Section 11 of the Department of Transportation Act, the thirteenth annual report of the Department of Transportation accounts the Department's activities during Fiscal Year 1979.
  • Operational and Safety Effects of Driving on Paved Shoulders in Texas
    Operational and Safety Effects of Driving on Paved Shoulders in Texas
    Fambro, Daniel B. ;
    Turner, D. S.
    1981-01-01 | PDF
    Paved shoulders in Texas are used by many drivers for making a large variety of traffic maneuvers and for satisfying numerous driving task demands. Unfortunately, there is little information as to the types and frequencies of this usage and the impacts and conditions under which they occur. This report documents research that was directed at provid ...
  • Land Use Impact of Improving Section Three of Westheimer Road in a Developing Area in Houston Texas
    Land Use Impact of Improving Section Three of Westheimer Road in a Developing Area in Houston, Texas
    Buffington, Jesse L. ;
    Herndon Jr, Cary W.
    1981-01-01 | PDF
    The majority of previous land use impact studies have been devoted to investigating the effects that new highway construction has on land use change and development. In view of the new emphasis placed upon upgrading and redesigning existing facilities rather than building new ones, highway planners need information relative to the influence that ex ...
  • Driver Understanding of Work Zone Flagger Signals and Signaling Devices
    Driver Understanding of Work Zone Flagger Signals and Signaling Devices
    Richards, S. H. ;
    Huddleston, N. D.
    1981-01-01 | PDF
    This report documents the results of a human factors laboratory study conducted in Texas to evaluate driver understanding of 13 work zone flagger signals. A total of 123 motorists participated in the study, with 23 to 73 motorists viewing each signal. The signals evaluated included: 1) seven standard signals recommended in the 1980 Texas MUTCD, 2) ...
  • Predicting Traffic Volume Growth Rates Resulting from Changes in Highway Capacity and Land Development
    Predicting Traffic Volume Growth Rates Resulting from Changes in Highway Capacity and Land Development
    Memmott, Jeffrey L. ;
    Buffington, Jesse L.
    1981-01-01 | PDF
    The magnitude of potential highway user benefits and costs resulting from proposed highway improvements must be estimated with a reasonable degree of accuracy for highway agencies to make rational decisions in the public interest. The Highway Economic Evaluation Model (HEEM) has been developed for that purpose. One of the important aspects of the m ...
  • Land Use Impact of Improving West Vickery Boulevard in a Developing Area of Fort Worth Texas
    Land Use Impact of Improving West Vickery Boulevard in a Developing Area of Fort Worth, Texas
    Cosby, Pamela J. ;
    Buffington, Jesse L.
    1981-01-01 | PDF
    Previous land use studies about the effects of highway construction have focused mainly on the effects of new construction. Due to the present emphasis on upgrading and expanding existing facilities rather than building new ones, the need arises for information concerning the effects on land use of such improvements. This report relates the finding ...
  • Land Use Impact of Improving Pipeline Road in a Developing Area of Hurst Texas
    Land Use Impact of Improving Pipeline Road in a Developing Area of Hurst, Texas
    Cosby, Pamela J. ;
    Buffington, Jesse L.
    1981-01-01 | PDF
    Previous studies of highway construction effects on land use have focused mainly upon the effects of the construction of new highways. In view of a new emphasis upon upgrading and expanding existing facilities rather than building new ones, the need arises for information concerning the land use effects of such improvements. This report relates the ...
  • Evaluation of the First Year of Operation I45 Contraflow Lane Houston
    Evaluation of the First Year of Operation, I-45 Contraflow Lane, Houston
    McCasland, William R.
    1981-01-01 | PDF
    This report presents an evaluation of the Contraflow Lane Project on the I-45 North Freeway in Houston. The purpose of this study is to assess the impacts of the contraflow lane on the operational characteristics of all freeway users. The Contraflow Lane Project is described and the usage of the priority lane for the first 12 months of operation is ...
  • 1975 1979 National Truck Characteristic Report 1981
    1975 - 1979 National Truck Characteristic Report (1981)
    United States. Federal Highway Administration
    1981-01-01 | PDF
    No Description
  • The Development of Traffic Information for Estimation of Mobile Source Emissions for Air Quality Modeling Volume 1 Annotated Bibliography
    The Development of Traffic Information for Estimation of Mobile Source Emissions for Air Quality Modeling: Volume 1, Annotated Bibliography
    Dresser, George B. ;
    Horton, Ann C.
    1981-01-01 | PDF
    This report provides annotations of over 90 publications that were relevant to the objectives of a research study on the development of traffic information for estimation of mobile source emissions for air quality modeling. The abstracts reviewed, while not complete or comprehensive, are representative of the current literature. Emphasis was placed ...
  • Analysis of Fly Ashes Produced in Texas
    Analysis of Fly Ashes Produced in Texas
    McKerall, William C. ;
    Ledbetter, W. B.
    1981-01-01 | PDF
    Five fly ashes produced in Texas from sub-bituminous coals and lignites were analyzed in terms of variability and their effect on fresh properties of mortars. As these fly ashes contain significant quantities of CaO, a rapid and reliable method of determining the total CaO content was developed. Using the CaO Heat Evolution Test. the CaO content ca ...
  • Rehabilitation and Maintenance System State Optimal Fund Allocation Program II RAMSSOFA2
    Rehabilitation and Maintenance System: State Optimal Fund Allocation, Program II (RAMS-SOFA-2)
    Phillips, Don T. ;
    Shanmugham, Chiyyarath V.
    1981-01-01 | PDF
    The Rehabilitation and Maintenance System - State Optimal Fund Allocation Program II (RAMS-SOFA-2) has been developed to aid the Texas State Department of Highways and Public Transportation in determining the optimal statewide strategy and fund allocation district by district. The program is specially designed to make decisions on rehabilitation an ...
  • Rehabilitation and Maintenance System District Time Optimization RAMSDTO1
    Rehabilitation and Maintenance System District Time Optimization (RAMS-DTO-1)
    Phillips, Don T. ;
    Shanmugham, Chiyyarath V.
    1981-01-01 | PDF
    The formulation and solution of the multi-year District Rehabilitation And Maintenance problem is presented. The problem is formulated as a 0-1 integer nonlinear programming problem (INLP) and the solution methodology uses the concepts of relaxation, decomposition, and network formulation to convert the 0-1 INLP problem into 0-1 integer linear prog ...
  • Pavement Roughness on Expansive Clays
    Pavement Roughness on Expansive Clays
    Velasco, Manuel O. ;
    Lytton, Robert L.
    1981-01-01 | PDF
    The patterns of pavement roughness caused by expansive clays are due largely to the underlying patterns of cracks in the subgrade soil mass. The cracks will be closer together when the soil is more active and when the climatic wetting and drying cycles have greater influence. The cracking patterns in the soil and the consequent roughness patterns a ...
  • Field Evaluation of Pavement Marking Materials Nontoxic Yellow Paint
    Field Evaluation of Pavement Marking Materials: Nontoxic Yellow Paint
    Raska, Joseph G.
    1981-01-01 | PDF
    Evaluations of traffic paint markings were conducted in an effort to determine their daytime and nighttime functionality. Included in the project initially were two formulations supplied by FHWA, a 50/50 blend of the white and yellow traffic paint currently used by the SDHPT, and the yellow traffic paint currently used by SDHPT. These traffic marki ...
  • Field Trials of SulphurExtendedAsphalt Binder in Open Graded Friction Course Loop 495 Nacogdoches Texas A Detailed Construction Report
    Field Trials of Sulphur-Extended-Asphalt Binder in Open Graded Friction Course Loop 495, Nacogdoches, Texas: A Detailed Construction Report
    Benson, F. C. ;
    Gallaway, B. M.
    1981-01-01 | PDF
    Important experience has been gained in the successful use of sulfur extended-asphalt (SEA) binder in an open graded friction course (OGFC) in field trials conducted on Loop 495 in Nacogdoches, Texas on August 7 and 8, 1980. This project was the first whereby the State Department of Highways and Public Transportation (SDHPT) has used SEA in an 'OGF ...
  • An overview on pay adjustment factors for asphalt concrete mixtures
    An overview on pay adjustment factors for asphalt concrete mixtures.
    Moore, Richard M. ;
    Mahoney, Joe P.
    1981-01-01 | PDF
    In the fall of 1979, the Oregon State Highway Division and Oregon State University, with participation from the University of Washington, initiated a research project to study the impact of variations in material properties on asphalt pavement life. The study is aimed at developing a rational approach to assessing the effects of variations from spe ...
  • The Chace air indicator
    The Chace air indicator.
    Sprinkel, Michael M ;
    Lee, Bryan
    1981-01-01 | PDF
    The study reported here has revealed very poor agreement between air contents determined by the Chace air indicator (CAI) and those by the pressure method. In tests of highway concretes the pressure method gave values typically 30% higher than anticipated based on the CAI readings, which could result in the production of concrete with lower than an ...
  • Driver education program status report software system
    Driver education program status report : software system.
    Korf, Jerry L ;
    Harris, Philip S
    1981-01-01 | PDF
    In April of 1980, a joint decision between Research Council personnel and representatives of the Department of Education was reached, and a project was undertaken by the Research Council to provide a software system to process the annual Driver Education status report questionnaire. The primary function of this software system is to provide two rep ...
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