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Showing 35121 - 35140 of 36747 results
  • Automated Design of Prestressed Concrete Box Girders
    Automated Design of Prestressed Concrete Box Girders
    Jones, Harry L. ;
    James, Mike E.
    1975-09-01 | PDF
    Three computer programs have been developed or adapted to assist in the design of multi-beam prestressed concrete box girder bridges. Programs DBOXSS and DBOXDS treat girders with straight and draped strands, respectively. Each program has a "design'' option which selects. concrete release strength and strand pattern for a specified cross section a ...
  • Evaluation of Glare Reduction Techniques
    Evaluation of Glare Reduction Techniques
    Raine, W. L. ;
    Chatterton, N. E.
    1975-09-01 | PDF
    Degradation of the visual capacity of a motor vehicle driver caused by luminous 'sources' 1 on the driver's own vehicle during daylight is quantified according to luminance glare theory. Effects of driver's age and daylight conditions are considered, and a means for laboratory measurement of vehicle glare production characteristics is developed. Ba ...
  • Supplemental Report to the Final System Plan for Restructuring Railroads in the Northeast and Midwest Region Pursuant to the Regional Rail Reorganization Act of 1973
    Supplemental Report to the Final System Plan for Restructuring Railroads in the Northeast and Midwest Region Pursuant to the Regional Rail Reorganization Act of 1973
    United States Railway Association
    1975-09-01 | PDF
    The September 1975 Supplemental Report to the Final System Plan provides a technical implementation supplement to the United States Railway Association’s July 1975 Final System Plan. Whereas Volume I set out the principal restructuring, financial, legal, passenger-service, manpower, marketing, and property-designation framework, and Volume II addre ...
  • Control of large commercial vehicle accidents caused by front tire failures
    Control of large commercial vehicle accidents caused by front tire failures.
    Anderson, R.L. ;
    Nidey, R.A.
    1975-08-01 | PDF
    The Federal Highway Administration of the u.s. Department ofTransportation is concerned with the loss of life, injury, andproperty damage that result from front tire failure on heavydutytrucks. The Bureau of Motor Carrier Safety contractedwith Ultrasystems, Inc., the Dynamic Science Division (ContractNo. DOT-FH-11-8562), to conduct an inve~tigation ...
  • Evaluation of retrorefletive durability of raised pavement markers final report
    Evaluation of retrorefletive durability of raised pavement markers : final report.
    Kinchen, Richard W. ;
    LeBlanc, E. J.
    1975-08-01 | PDF
    The Louisiana Department of Highways began using reflectorized raised pavement markers on a large scale basis in 1967 when such markers were placed on the Mississippi River Bridge along Route I-10 at Baton Rouge. The Department has engaged in a considerable amount of research since 1967 in order to derive the most benefit from reflectorized raised ...
  • BenefitCost Analysis Updated Unit Costs and Procedures
    Benefit-Cost Analysis: Updated Unit Costs and Procedures
    Buffington, Jesse L. ;
    McFarland, William F.
    1975-08-01 | PDF
    Various freeway surveillance and traffic control projects can be implemented on Texas freeways to accomplish desired goals. In order to decide which project (if any) that should be implemented, a practical and reliable analytical procedure which considers all measurable impacts must be developed and applied. Also, accurate and up-to-date data must ...
  • Structural and Geometric Characteristics of HighwayRailroad Grade Crossings
    Structural and Geometric Characteristics of Highway-Railroad Grade Crossings
    Newton, Thomas M. ;
    Lytton, Robert L.
    1975-08-01 | PDF
    This report is the first in a series dealing with structural and geometric characteristics of highway-railroad grade crossings. The report details a study of crossing distribution and geometric characteristics, crossing appraisals, drainage, dynamic loadings, stabilization fabrics, and structural details for improved life and rideability.
  • Highway Revenues Under Changing Economic Conditions
    Highway Revenues Under Changing Economic Conditions
    Smith, Evelyn K. ;
    McFarland, William F.
    1975-08-01 | PDF
    The three primary sources of revenue for the State Department of Highways and Public Transportation (previously the Texas Highway Department) in the past have been federal funding, license fees, and motor fuels taxes. In 1974, these three sources alone accounted for over 93 percent of all revenues. With rising fuel prices at least two of these prim ...
  • Federal Funding of Rail Rehabilitation A Review of Alternative Approaches
    Federal Funding of Rail Rehabilitation: A Review of Alternative Approaches
    United States. Congress. Office of Technology Assessment  ...
    1975-08-01 | PDF
    This study explores the proposed mechanisms for injecting federal funds into the rehabilitation of the fixed plant of U.S. railroads--that is, the roadbed, ballast, ties, signaling systems, yards and terminals that make up the physical rail system. The study accomplishes two specific tasks: (1) it identifies and describes selected alternative fundi ...
  • Design and Construction of Compacted Shale Embankments Vol 1 Survey of Problem Areas and Current Practices
    Design and Construction of Compacted Shale Embankments: Vol. 1. Survey of Problem Areas and Current Practices
    Shamburger, J. H. ;
    Patrick, D. M.
    1975-08-01 | PDF
    The purpose of the three-phase study is to develop design and construction methodologies that will enable shales causing settlements and slope failure in highway embankments in the past to be identified and used successfully in future construction. During the first year's work (Phase I), state and federal agencies were contacted. Information obtain ...
  • ParkandRide Facilities Preliminary Planning Guidelines
    Park-and-Ride Facilities: Preliminary Planning Guidelines
    Christiansen, Dennis L. ;
    Grady, Douglas S.
    1975-08-01 | PDF
    This report presents a preliminary evaluation of park-and-ride facilities. A literature review was conducted and, from this, characteristics of park-and-ride service in the United States were documented. Also, each Texas city providing park-and-ride service was surveyed, and the existing or projected park-and-ride operations in five Texas cities ar ...
  • Correlation of the Texas Highway Department Cone Penetrometer Test with the Drained Shear Strength of Cohesionless Soils
    Correlation of the Texas Highway Department Cone Penetrometer Test with the Drained Shear Strength of Cohesionless Soils
    Cozart, George D. ;
    Coyle, Harry M.
    1975-08-01 | PDF
    Improved correlations have been developed between the Texas Highway Department (THD) Cone Penetrometer Test N-value and the drained shear strength of cohesionless soils. Cone penetrometer test data and undisturbed sand samples were obtained at five different test sites. To develop the correlations new techniques in sampling and testing of cohesionl ...
  • Corridor Analysis for Level of Service Design
    Corridor Analysis for Level of Service Design
    Rowan, Neilon J. ;
    Andersen, Donald A.
    1975-08-01 | PDF
    Research was conducted to improve the design process for transportation corridor facilities. Part of the research dealt with identifying and evaluating the current design recommendation process, while another phase dealt with functional classification, qualitative measures of traffic service, and the effects of midblock access on traffic operations ...
  • A Sensitivity Evaluation of Traffic Assignment
    A Sensitivity Evaluation of Traffic Assignment
    Buechler, Jay ;
    Stover, Vergil G.
    1975-08-01 | PDF
    The purpose of this study was to investigate the sensitivity of traffic assignment of input from the preceding modeling phases (i.e.' the trip generation and trip distribution phases). The analyses focused not only on sensitivity of assignment results to inaccuracies from the modeling phases, but the sensitivity of various commonly used measures of ...
  • Urban Transportation Study Procedures
    Urban Transportation Study Procedures
    Benson, J. D. ;
    Stover, Vergil G.
    1975-08-01 | PDF
    Study Number 2-10-74-17, "Urban Transportation Study Procedures," was originally a three-year planning study. Condensed to a two-year study effort, the technical support and research effort will continue under an interagency agreement contract. Study 17 was directed toward providing continuing technical support for the Texas State Department of Hig ...
  • A Guide for Designing and Operating Signalized Intersections in Texas
    A Guide for Designing and Operating Signalized Intersections in Texas
    Messer, Carroll J. ;
    Fambro, Daniel B.
    1975-08-01 | PDF
    This report presents a guide for designing and operating signalized intersections to serve rush hour traffic demands. Physical design and signalization alternatives are identified, and methods of evaluation are provided. The level of service criteria used in the design guide were selected to expedite the design process. These design criteria are re ...
  • CostEffectiveness Evaluation of Roadside Safety Improvements on Texas Highways
    Cost-Effectiveness Evaluation of Roadside Safety Improvements on Texas Highways
    Weaver, Graeme D. ;
    Woods, Donald L.
    1975-08-01 | PDF
    The report documents the development and application of methodology to inventory hazards and evaluate recommended safety improvements alongside controlled access highways and rural non-controlled access highways using one procedure and a common computer analysis program. Also included in the report is discussion of program output and interpretation ...
  • Test using expansive cement in cement stabilized base to eliminate or prevent cracking experimental projects
    Test using expansive cement in cement stabilized base to eliminate or prevent cracking : experimental projects.
    Rodriquez, Robert
    1975-08-01 | PDF
    The purpose of this study was to determine the feasibility of using anexpansive cement, TXI 4C Chem Comp, in lieu of the regular Type I PortlandCement in a cement stabilized gravel screenings base so as to eliminateor reduce cracks associated with this type of base construction. The testwas carried out by field experimentation and observation.The r ...
  • New Retaining Wall Design Criteria Based on Lateral Earth Pressure Measurements
    New Retaining Wall Design Criteria Based on Lateral Earth Pressure Measurements
    Wright, William V. ;
    Coyle, Harry M.
    1975-08-01 | PDF
    A procedure for determination of the lateral earth pressure distribution to be used for computation of forces and moments acting on retaining walls which are fixed at their base and backfilled with cohesionless sand are developed in this study. The procedure is based on the analysis of data collected from two instrumented full scale retaining walls ...
  • Final System Plan for Restructuring Railroads in the Northeast and Midwest Region Pursuant to the Regional Rail Reorganization Act of 1973 Volume II Part III Light Density Lines and Community Impact
    Final System Plan for Restructuring Railroads in the Northeast and Midwest Region Pursuant to the Regional Rail Reorganization Act of 1973: Volume II, Part III, Light Density Lines and Community Impact
    United States Railway Association
    1975-07-26 | PDF
    Volume 2 of the United States Railway Association’s Final System Plan addresses one of the most difficult implementation problems created by the Northeast and Midwest railroad crisis: how to distinguish rail properties that should be incorporated into a financially viable Conrail system from light-density lines whose continued operation would requi ...
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