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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 31161 - 31180 of 35440 results
  • Guidelines for guardrail on lowvolume roads
    Guidelines for guardrail on low-volume roads.
    Arnold, E. D
    1990-01-01 | PDF
    Guardrail is a type of longitudinal barrier installed along a roadside to shield vehicles from hazards. Guardrail is itself a hazard and should be installed only if it would reduce the severity of accidents. Accordingly, the American Association of State Highway and Transportation Officials (AASHTO) has guidelines that can be used to evaluate the n ...
  • Procedures for prioritizing road improvements under the statewide highway plan final report
    Procedures for prioritizing road improvements under the statewide highway plan : final report.
    McGeehan, Daniel D ;
    Samuel, Lynn
    1990-01-01 | PDF
    The road improvement prioritizing system currently utilized by the Virginia Department of Transportation is similar to the method utilized by many states: it is a sufficiency rating system that evaluates proposed projects on the basis of points assigned for a number of variables. Although this type of system is commonly used, it has several limitat ...
  • Optimal speed limits for school buses on Virginia highways a report to Virginias Superintendent of Public Instruction
    Optimal speed limits for school buses on Virginia highways : a report to Virginia's Superintendent of Public Instruction.
    Jernigan, Jack D ;
    Lynn, Cheryl W
    1990-01-01 | PDF
    On Virginia's rural interstate highways there is a three-tiered speed limit: 45 mph for school buses, 55 mph for trucks, and 65 mph for other vehicles. On the urban interstate highways, school buses are restricted to 45 mph, but other traffic has a 55 mph speed limit. Speed theory suggests that (1) restricting school buses to slower speeds will not ...
  • Evaluation of surface treatments
    Evaluation of surface treatments.
    Payne, Charles W ;
    Mahone, David C
    1990-01-01 | PDF
    This report describes the installation, evaluation, and performance of surface treatment test sections placed during 1983, 1984, and 1985. The study was initiated because of adhesion problems between asphalt and river gravel in the Fredericksburg District. However, observations by the researchers and complaints from other districts indicated that a ...
  • The variability of the indirect tensile stripping test
    The variability of the indirect tensile stripping test.
    Maupin, G. W
    1990-01-01 | PDF
    The purpose of this investigation was to determine the variability of the Virginia Department of Transportation's (VDOT) indirect tensile stripping test. Five contractor labs and eight VDOT labs participated in the study. Each lab performed three replicate tests on each of two mixes, one containing hydrated lime and one containing chemical antistri ...
  • The impact of the 65 mph speed limit on Virginias rural interstate highways through 1989
    The impact of the 65 mph speed limit on Virginia's rural interstate highways through 1989.
    Jernigan, Jack D ;
    Lynn, Cheryl
    1990-01-01 | PDF
    In April 1987, Congress passed the Surface Transportation and Uniform Relocation Assistance Act (STURAA) which permitted states to raise their maximum speed limit on rural interstate highways (rural interstates) to 65 mph. Since then, 40 states, including Virginia have adopted a 65 mph maximum speed limit. Virginia's 65 mph speed limit became effec ...
  • Installation and performance evaluation of the wabocrete FMV joint system for bridge decks
    Installation and performance evaluation of the wabocrete FMV joint system for bridge decks.
    Hilton, Marvin H
    1990-01-01 | PDF
    A Wabocrete FMV bridge deck expansion joint system was installed on the Alternate Rte. 58 bridge over the Clinch River in November 1986. The bridge was placed in service in mid-1987. The report concerns an installation and performance evaluation of the joint system. It was found that the Wabocrete FMV joint system offers some installation advantage ...
  • Comparison of air void content measurements in fresh versus hardened concretes
    Comparison of air void content measurements in fresh versus hardened concretes.
    Ozyildirim, H. Celik
    1990-01-01 | PDF
    This study compares the air content of freshly mixed and hardened concretes. At the fresh stage, pressure meters (Types A and B) and a volumetric meter were used to determine the air content. At the hardened stage, the air content was calculated using the linear traverse method described in ASTM C 457, which is a microscopical procedure. The unit w ...
  • Polymerimpregnated bridge slabs performance over 10 years
    Polymer-impregnated bridge slabs : performance over 10 years.
    Sprinkel, Michael M
    1990-01-01 | PDF
    This report presents the results of a study to evaluate the performance over a 10-year period of slabs that were impregnated to a depth of about 1 in with a monomer that was subsequently polymerized (shallow polymer impregnation). The slabs were used to widen a bridge. The report contains data obtained from evaluations done after 3, 5, 7, and I0 ye ...
  • A methodology for conducting underwater archaeological surveys final report
    A methodology for conducting underwater archaeological surveys : final report.
    Samuel, Lynn H ;
    McGeehan, Daniel D
    1990-01-01 | PDF
    Departments of transportation and other construction agencies are required to locate and conserve cultural resources located in the area of a construction project. Although most organizations have procedures for locating cultural resources on land, the relatively new field of underwater archaeology lacks clearly defined guidelines for preconstructi ...
  • Implementation of a pavement management system for Virginias general aviation airports final report
    Implementation of a pavement management system for Virginia's general aviation airports : final report.
    McGhee, Kenneth H
    1990-01-01 | PDF
    This report summarizes the activities undertaken to implement a pavement management system at 56 general aviation airports coming under the jurisdiction of the Virginia Department of Aviation (VDOAV). The system, which is called Micro-PAVER, is a proprietary program developed by the U.S. Army Corps of Engineers. It is reported to be used at many ai ...
  • Motor vehicle ignition interlocks invehicle devices that monitor alcohol levels of motor vehicle operators
    Motor vehicle ignition interlocks : in-vehicle devices that monitor alcohol levels of motor vehicle operators.
    Wilson, Cole B ;
    Stoke, Charles B
    1990-01-01 | PDF
    This project was initiated at the request of the Department of Motor Vehicles as a response to House Joint Resolution 378 (1989). The resolution requested an evaluation of research studies on ignition interlocks and a determination of possible benefits to the Commonwealth of Virginia from using this technology to control drunken driving. A survey o ...
  • Construction manpower management system
    Construction manpower management system.
    Hughes, C. S ;
    Long, R. R
    1990-01-01 | PDF
    This report traces the development of and explains the operation of a Construction Manpower Management System (CMMS) developed for the Virginia Department of Transportation (VDOT). Initial direction for this project was received from the Construction Engineering Manpower Management System Pooled Fund Study and a study performed for VDOT by Price Wa ...
  • Feasibility of using recycled glass in asphalt
    Feasibility of using recycled glass in asphalt.
    Hughes, C. S
    1990-01-01 | PDF
    This report was written in response to HJR 301, which "requests the VDOT to conduct a study of the feasibility of using recycled glass as supplemental aggregates in asphalt." The laboratory study did not indicate that there would be any adverse affects from the use of small percentages of glass (5 to 15 percent) under controlled gradation condition ...
  • Accident characteristics at construction and maintenance zones in urban areas
    Accident characteristics at construction and maintenance zones in urban areas.
    Garber, Nicholas J ;
    Woo, Tzong-Shiou Hugh
    1990-01-01 | PDF
    Work zone safety is currently a major concern to transportation and highway engineers because of the relatively higher rates of accidents in these areas. There is a strong indication that during the next decade, emphasis will be placed on maintenance and rehabilitation of the nation's highways rather than on the construction of new highways. This w ...
  • A manual for the repair and protection of hydraulic cement concrete bridge decks
    A manual for the repair and protection of hydraulic cement concrete bridge decks.
    Sprinkel, Michael M
    1990-01-01 | PDF
    No Description
  • An operating guide for the control of residential cutthrough traffic
    An operating guide for the control of residential cut-through traffic.
    Cottrell, Benjamin H
    1990-01-01 | PDF
    The objective of this operating guide was to provide direction in conducting studies in accordance with the Policy and Procedures for Control of Residential Cut-Through Traffic" of the Virginia Department of Transportation. The guide is in eight parts: (1) Policy and Procedures for Control of Residential Cut-Through Traffic, (2) Cut-Through Traffic ...
  • Review of paved shoulders
    Review of paved shoulders.
    Cottrell, Benjamin H
    1990-01-01 | PDF
    The objectives of this study were (1) to review the literature on paved shoulders, (2) to survey state departments of transportation on their use of paved shoulders on two laneroads, (3) to perform a cost analysis on paved shoulders, and (4) to draw conclusions based on the findings. The scope was limited to shoulders made of an asphalt plant mixtu ...
  • Multimodal Transportation Analysis Process MTAP A Travel Demand Forecasting Model
    Multimodal Transportation Analysis Process (MTAP): A Travel Demand Forecasting Model
    North Central Texas Council of Governments. Transportation Dept.
    1990-01-01 | PDF
    In 1986, the North Central Texas Council of Governments (NCTCOG) undertook the revision of its travel demand forecasting model. The outcome was a model which was developed based on travel patterns in the Dallas-Fort Worth area and used jointly by the four agencies. The forecasting technique is based on a four-step sequential process designed to mod ...
  • Stateoftheart report on rapid repair techniques for bridge decks
    State-of-the-art report on rapid repair techniques for bridge decks.
    Sprinkel, Michael M ;
    Sellars, Angela R
    1990-01-01 | PDF
    Bridges that are candidates for rapid repair techniques have peak-hour traffic volumes that are so high that it is not practical to close a lane to repair the deck or to install a deck protection system except during off-peak traffic periods. This report summarizes the results of the first 25 months of a 55-month project (Task 4 of SHRP Project CI0 ...
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