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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 30581 - 30600 of 35440 results
  • Commuting congestion and pollution the employerpaid parking connection
    Commuting, congestion, and pollution : the employer-paid parking connection
    Shoup, Donald C. ;
    Willson, Richard W.
    1992-09-01 | PDF
    Urban areas increasingly face problems associated with traffic congestion and vehicle air emissions. Employer-paid parking--a form of matching grant whereby an employer offers to pay the cost of parking if employees are willing to pay all other costs of driving to work--contributes to the tendency of employees to drive alone to work. In Los Angeles ...
  • Evaluation of the Express Lane Effectiveness in Freeway to Freeway Interchanges
    Evaluation of the Express Lane Effectiveness in Freeway to Freeway Interchanges
    Hanks, Jr. James W ;
    Barnes, Kirk E.
    1992-09-01 | PDF
    This research report focused on presenting three case studies and illustrating the process by which express lane design for freeway interchanges may be evaluated. The three case studies used for evaluation purposes were: 1) isolated interchanges, 2) an isolated dual-route interchange, and 3) a system of connected interchanges. The primary purpose o ...
  • Using the Multidepth Deflectometer to Study Tire Pressure Tire Type and Load Effects on Pavements
    Using the Multidepth Deflectometer to Study Tire Pressure, Tire Type, and Load Effects on Pavements
    Akram, Tayyeb ;
    Scullion, Tom
    1992-09-01 | PDF
    In this study the impact of truck tire type, inflation pressure, speed, and axle load was examined by measuring depth deflections in two pavement structures (one thick, one thin) instrumented with multi-depth deflectometers (MDD's). Measured depth deflections under truck loadings were converted into average vertical compressive strains in the pavem ...
  • Measurement of Tire Footprint Pressures
    Measurement of Tire Footprint Pressures
    Tielking, John T. ;
    Abraham, Moises A.
    1992-09-01 | PDF
    A triaxial load pin array for measuring tire footprint pressures was recently purchased by TTI. This report describes our initial experience and results obtained with the array during a 3-month summer period in 1992. Footprint pressure distributions were measured for two highway-type radial truck tires (a conventional single and a wide base single) ...
  • Closure of the GIWW and Its Impact on the Texas Highway Transportation System Interim Report
    Closure of the GIWW and Its Impact on the Texas Highway Transportation System: Interim Report
    Roop, Stephen S. ;
    Wang, Daryl U.
    1992-09-01 | PDF
    This report documents the activities and accomplishments of the first year of a two-year research effort designed to predict the impact of an interruption in service of the GIWW (Gulf Intracoastal Waterway) to the Texas highway system. The research is to consider the kinds of disruptive events possible, their probability, the location and duration ...
  • Influence of Asphalt Layering and Surface Treatments on Asphalt and Base Layer Thickness Computations Using Radar
    Influence of Asphalt Layering and Surface Treatments on Asphalt and Base Layer Thickness Computations Using Radar
    Maser, Kenneth R. ;
    Scullion, Tom
    1992-09-01 | PDF
    This study has been carried out with the specific objective of evaluating the influence of thin overlays and surface treatments on the accuracy of pavement thickness calculations using radar. Nine SHRP GPS and SPS sites located on three Texas primary roads were surveyed with radar: two each with a slurry seal, a chip seal, a new overlay, and an old ...
  • Travel Impacts of the US59 Southwest Freeway Reconstruction Project in Houston
    Travel Impacts of the US-59 Southwest Freeway Reconstruction Project in Houston
    Shafer, Mark A ;
    Tyer, Kevin D.
    1992-09-01 | PDF
    This report documents the results and findings of a five-year study to monitor the travel impacts of the US-59 Southwest Freeway reconstruction project in Houston, Texas. The monitoring effort included screen line traffic volume counts and travel time runs on the freeway, frontage roads, and alternative routes. The results indicate drops in traffic ...
  • Updated ShortTerm Freeway Work Zone Lane Closure Capacity Values
    Updated Short-Term Freeway Work Zone Lane Closure Capacity Values
    Krammes, Raymond A ;
    Lopez, Gustavo O
    1992-09-01 | PDF
    Recommendations on estimating the capacity of short-term freeway work zone lane closures are presented. The recommendations are based upon 45 hours of capacity counts at 33 different work zones between 1987 and 1991. These new data indicate average capacities for short-term freeway work zone lane closures from 3 to 1 lanes and from 2 to 1 lanes tha ...
  • Design and development of data acquisition system for the Louisiana accelerated loading device final report
    Design and development of data acquisition system for the Louisiana accelerated loading device : final report.
    Mohammad, Louay N. ;
    Kathavate, Srinivas K.
    1992-09-01 | PDF
    The Louisiana Transportation Research Center has established a Pavement Research Facility (PRF). The core of the PRF is a testing machine that is capable of conducting full-scale simulated and accelerated load testing of pavement materials, construction, and performance; and to verify mathematical models of mechanistic pavement design procedures.In ...
  • Engineering properties of brittle repair materials final report volume I
    Engineering properties of brittle repair materials : final report : volume I.
    Voyiadjis, George Z. ;
    Channakeshava, C.
    1992-09-01 | PDF
    Most codes of practice prescribe procedures for selecting patch configuration and materials based on tests devised for evaluating new pavement materials. This study is aimed at examining the special consideration to be given to such evaluation procedures and to suggest improved procedures for brittle repair materials, based on additional tests and ...
  • Engineering properties of brittle repair materials final report volume II
    Engineering properties of brittle repair materials : final report : volume II.
    Voyiadjis, George Z. ;
    Channakeshava, C.
    1992-09-01 | PDF
    Most codes of practice prescribe procedures for selecting patch configuration and materials based on tests devised for evaluating new pavement materials. This study is aimed at examining the special consideration to be given to such evaluation procedures and to suggest improved procedures for brittle repair materials, based on additional tests and ...
  • Engineering properties of brittle repair materials summary report
    Engineering properties of brittle repair materials : summary report.
    Voyiadjis, George Z. ;
    Channakeshava, C.
    1992-09-01 | PDF
    Most codes of practice prescribe procedures for selecting patch configuration and materials based on test devised for evaluating new pavement materials. This study is aimed at examining the special consideration to be given to such evaluation procedures and to suggest improved procedures for brittle repair materials, based on additional tests and c ...
  • Tworail steelbacked timber guardrail system Crown Point Highway Multnomah County Oregon construction report
    Two-rail steel-backed timber guardrail system : Crown Point Highway, Multnomah County, Oregon : construction report.
    Groom, Kevin M.
    1992-09-01 | PDF
    Guardrails in Oregon have traditionally been constructed using a steel W-beam guardrail. Although the steel guardrail has functioned well in the past, it is not aesthetically pleasing. To achieve a more pleasant drive through parks and scenic highways, the Oregon Department of Transportation (ODOT) decided to install a timber guardrail. The Federal ...
  • Research notes Brugg Cable Mesh Rockfall Fence Shellrock Mountain Section Lower Columbia River Highway I84 Hood River County
    Research notes : Brugg Cable Mesh Rockfall Fence, Shellrock Mountain Section, Lower Columbia River Highway (I-84), Hood River County.
    D'Agnese, Susanne L.
    1992-09-01 | PDF
    No Description
  • Interstate rehabilitation with HaTelit polyester grid I10 SulphurWestlake Calcasieu Parish interim report
    Interstate rehabilitation with HaTelit polyester grid I-10 Sulphur-Westlake, Calcasieu Parish : interim report.
    King, William M.
    1992-09-01 | PDF
    This report documents the construction and initial evaluation of the HaTelit 20/9 Polyester Geogrid material placed at mid-depth of the HMAC overlay of the Broken and Seated PCC pavement on Interstate 10, west of Lake Charles, LA. The roadway has an ADT of 43,400 vpd with 20% of these being heavy trucks. This experimental feature is expected to red ...
  • Predicting Skin Friction for Pile Design
    Predicting Skin Friction for Pile Design
    Turner, John P. ;
    Sandberg, Eric W
    1992-08-31 | PDF
    This study presents the results of eighteen field uplift load tests on drilled shaft foundations. The tests were conducted to evaluate the reliability of a procedure used by the South Dakota Department of Transportation (SDDOT) to evaluate side resistance of deep foundations. This procedure utilizes a field test in which a drill rod is driven into ...
  • OnOrbit Collision Hazard Analysis in Low Earth Orbit Using the Poisson Probability Distribution Version 10
    On-Orbit Collision Hazard Analysis in Low Earth Orbit Using the Poisson Probability Distribution (Version 1.0)
    Kaman Sciences Corporation
    1992-08-26 | PDF
    This document provides the basic information needed to estimate a generalprobability of collision in Low Earth Orbit (LEO). Although the methoddescribed in this primer is a first order approximation, its results arereasonable. Furthermore, the methods described above can be the basis fordeveloping more rigorous techniques for calculating collision ...
  • FAA Directives System
    FAA Directives System
    United States. Department of Transportation. Federal Aviation Administration
    1992-08-26 | PDF
    Consistent with the Federal Aviation Administration's mission to foster a safe, secure, and efficient aviation system is the need for an effective and efficient process for communicating policy and procedures. The FAA Directives System provides a practical framework for the agency's communication process and establishes standards for issuing direct ...
  • AluminumCold Temperature Tank Car Puncture Resistance Test Data Report
    Aluminum/Cold Temperature Tank Car Puncture Resistance Test: Data Report
    Larson, William G.
    1992-08-01 | PDF
    Puncture resistance testing of DOT Type 111 aluminum tank car heads was conducted at the Transportation Test Center (TTC), Pueblo, Colorado. Testing was conducted to determine the puncture resistance of a standard Type 111 aluminum tank car relative to that of DOT Type 112/114 and 105 steel tank car designs. Physical parameters, such as head thickn ...
  • TDM Status Report Transportation Allowances
    TDM Status Report: Transportation Allowances
    K.T. Analytics, Inc.  ...
    1992-08-01 | PDF
    The status report discusses the following travel allowance programs that provide subsidies to employees in one form or another: transit fare allowances or subsidies; vanpool fare allowances; parking allowances or free parking; and general travel allowances. Examples are given for each type of program. The report also recognizes that transit and rid ...
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