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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 30561 - 30580 of 35440 results
  • Evaluation of the impact of changes in the hours of service regulation on efficiency drivers and safety
    Evaluation of the impact of changes in the hours of service regulation on efficiency, drivers, and safety
    Griffin, Gene ;
    Rodriguez, Julene
    1992-10-01 | PDF
    This paper examines the potential gains and losses of a change in hours of service rules for truck drivers. The authors conclude that drivers, carriers, and society in general would experience positive net gains from a change in the cumulative hours of service rules from the current 70-in-8 day rule to a 24-hour restart provision. These gains would ...
  • Dynamic Buff and Draft Testing Techniques
    Dynamic Buff and Draft Testing Techniques
    El-Sibale, Magdy
    1992-10-01 | PDF
    The test car was used to evaluate the safe curving limits of two candidate cars, namely the Frontrunner and the 89-foot flatcar, under buff and draft loads of up to 250,000 pounds (113,400 kg) and for a 10-degree curve. The tests, supported by analysis, showed that coupling of the Frontrunner to the 89-foot (27 m) flatcar reduces the flatcar's abil ...
  • High Profile Rail Clearances in the State of Pennsylvania Reports 1 thru 5
    High Profile Rail Clearances in the State of Pennsylvania: Reports 1 thru 5
    Transmode Consultants  ...
    1992-10-01 | PDF
    During the past decade, the decade since deregulation, the rail industry has significantly increased its productivity. This increase in productivity has increased the "value" of the transportation services which the industry offers to its customers. Productivity gains have come from a number of sources, including increases in labor productivity and ...
  • Analysis of Freeway Traffic Speed by Power Spectral Density Methods
    Analysis of Freeway Traffic Speed by Power Spectral Density Methods
    Lu, Jian
    1992-10-01 | PDF
    This report presents results of a study using a Maximum Entropy Spectral Analysis (MESA) approach to evaluate driver behavior as related to driving speed, taking into consideration heavy and light traffic conditions, rainy and dry weather conditions, impacts of traffic entering from ramps, and operating characteristics of various drivers. Three tes ...
  • Manual on Contracting for Vehicle Maintenance Services FTAIA0008921
    Manual on Contracting for Vehicle Maintenance Services [FTA-IA-0008-92-1]
    Maze, T. H. ;
    Waggoner, Kathleen
    1992-10-01 | PDF
    The purpose of this manual is to guide transit agencies in the development of contracting documents and contracting relationships. Although the manual focuses on rural, small urban, and specialized transit operations, it contains useful information for all public agencies intending to purchase vehicle maintenance services through competitively awar ...
  • Piecework theory and applications to the motor carrier industry
    Piecework : theory and applications to the motor carrier industry
    Lantz, Brenda
    1992-10-01 | PDF
    In the motor carrier industry, many drivers are paid based on the number of miles they drive. Because of this, they can be said to be on a piecework system of payment. This paper explores some ideas and theory about piecework and applies these to drivers. The theories discussed are those pertaining to (1) setting the piece rates, (2) changing the r ...
  • Incident Response and Clearance in the State of Texas Case Studies of Four Motorist Assistance Patrols
    Incident Response and Clearance in the State of Texas: Case Studies of Four Motorist Assistance Patrols
    Wohlschlaeger, Steven D. ;
    Balke, Kevin N.
    1992-10-01 | PDF
    Collector-distributor roadways can be effective as a "buffer" facility with limited access interfacing between main lanes and frontage road development. However, both transverse and longitudinal space requirements are critical for acceptable implementation. This report summarizes several key aspects of collector-distributor freeway system design co ...
  • Effect of Freeway Corridor Attributes upon Motorist Diversion Responses to RealTime Travel Time Information
    Effect of Freeway Corridor Attributes upon Motorist Diversion Responses to Real-Time Travel Time Information
    Ullman, Gerald L. ;
    Dudek, Conrad L.
    1992-10-01 | PDF
    This report describes the results of laboratory experiments performed to assess whether certain freeway corridor attributes specified in a real-time motorist information display affect motorists' expected responses to travel time information. Specifically, the study was designed to determine whether (1) the recommended alternative route, (2) the lo ...
  • An Evaluation of Freeway Capacity in Texas
    An Evaluation of Freeway Capacity in Texas
    Ringert, John ;
    Urbanik II, Thomas
    1992-10-01 | PDF
    The current value of freeway capacity and the speed flow relationship have been questioned as a result of observations of flow rates much higher than 2,000 passenger cars per hour per lane (pcphpl) and the recent revision of the multi-lane highway chapter in the Highway Capacity Manual. An analysis of freeway capacity in Texas found greater variabi ...
  • Retroreflective Raised Pavement Marker Field Testing Initial Interim Report
    Retroreflective Raised Pavement Marker Field Testing: Initial Interim Report
    Ullman, Gerald L.
    1992-10-01 | PDF
    The Texas Department of Transportation has initiated a two-year field test of seventeen types of retroreflective raised pavement markers (RRPMs). The RRPMs were installed at four freeway facilities in District 15 (San Antonio) in August 1992. A sample of RRPMs is removed from the sites periodically to assess reflectivity retention of each type of m ...
  • EndResult Smoothness Specifications for Rigid and Flexible Pavements in Texas
    End-Result Smoothness Specifications for Rigid and Flexible Pavements in Texas
    Goulias, Dimitrios ;
    Dossey, Terry
    1992-10-01 | PDF
    This report focuses on the development of a methodology for determining an end-result smoothness specification for use on newly constructed flexible and rigid pavements. Details of the experimental study and data analysis undertaken to define acceptance levels using several criteria are presented, along with necessary guidelines that can be used fo ...
  • CostEffectiveness Analysis of TxDOT LPG Fleet Conversion Volume 1
    Cost-Effectiveness Analysis of TxDOT LPG Fleet Conversion: Volume 1
    Euritt, Mark A. ;
    Taylor, Dean B.
    1992-10-01 | PDF
    Increased emphasis on energy efficiency and air quality has resulted in a number of state and federal initiatives examining the use of alternative fuels for motor vehicles. Texas' program for alternate fuels includes liquefied petroleum gas (LPG). Based on an analysis of 30-year life-cycle costs, development of a propane vehicle program for the Tex ...
  • Flood frequency analysis using optimization techniques final report
    Flood frequency analysis using optimization techniques : final report.
    Naghavi, Babak ;
    Yu, Fangxin
    1992-10-01 | PDF
    this study consists of three parts. In the first part, a comprehensive investigation was made to find an improved estimation method for the log-Pearson type 3 (LP3) distribution by using optimization techniques. Ninety sets of observed Louisiana flood data and 690 sets of Monte Carlo simulated LP3 data were used for the study. Based on the performa ...
  • Louisiana Airport System Plan
    Louisiana Airport System Plan.
    Dresser, George B. ;
    Horton, Ann M.
    1992-10-01 | PDF
    This report is a non-technical summary of the update to the Louisiana Airport System Plan. The system plan identifies the location, service level, and role of the 81 airports included in the plan and the costs to develop individual airports and the airport system as a whole during the 0-5 year and 6-10 year planning periods. Major chapters discuss ...
  • Research notes tworail steelbacked timber guardrail Crown Point Highway Multnomah County Oregon
    Research notes : two-rail steel-backed timber guardrail : Crown Point Highway, Multnomah County, Oregon.
    Oregon. Department of Transportation. Materials and Research Section
    1992-10-01 | PDF
    The Oregon Department of Transportation (ODOT) recently installed a two-rail steel-backed timber guardrail along a section of the Crown Point Highway. The guardrail was installed as an Experimental Features Project to see how an aesthetically designed guardrail would perform on a scenic highway. The two-rail steel-backed timber guardrail was approv ...
  • Validity of Clinical Color Vision Tests for Air Traffic Control Specialists
    Validity of Clinical Color Vision Tests for Air Traffic Control Specialists
    Mertens, Henry W. ;
    Milburn, Nelda J.
    1992-10-01 | PDF
    An experiment on the relationship between aeromedical color vision screening test performance and performance on color-dependent tasks of Air Traffic Control Specialists was replicated to expand the data base supporting the job-related validity of the screening tests. The original experiment (Mertens, 1990; n=108), and the replication (n=136) invol ...
  • Guideline Specifications for Passive Lifts Active Lifts Wheelchair Ramps and Securement Devices
    Guideline Specifications for Passive Lifts, Active Lifts, Wheelchair Ramps, and Securement Devices
    Francis, Gerald A. ;
    Norstrom, David
    1992-09-01 | PDF
    No Description
  • Asymmetric Effects of Deregulation
    Asymmetric Effects of Deregulation
    Wilson, Wesley W.
    1992-09-01 | PDF
    Since partial deregulation of the railroad industry in 1980, rail rates have fallen in real terms, leading many observers to conclude that deregulation has been a success. Yet, previous studies of the effects of deregulation on aggregate rate levels are inconclusive in identifying deregulation as the reason for lower rates. In this paper, I develop ...
  • Characteristics of urban transportation systems
    Characteristics of urban transportation systems
    Cambridge Systematics  ...
    1992-09-01 | PDF
    The objective of this document is to provide a single source of sketch planning data on the most important performance characteristics of contemporary urban transportation systems in a format that lends itself to easy reference. This handbook does not deal explicitly with passenger demand, but assesses only the supply or performance characteristic ...
  • Using the revenues from congestion pricing a Southern California case study
    Using the revenues from congestion pricing : a Southern California case study
    Small, Kenneth A.
    1992-09-01 | PDF
    Congestion pricing has many goals and benefits, but one thing is clear: its success depends on wise use of the revenues. The economic theory behind the concept relies on these revenues to help compensate for the payments required of highway users. Practical and ethical considerations similarly dictate that those who would otherwise be harmed by the ...
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