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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 29901 - 29920 of 35440 results
  • Corridor Analysis Guidelines for Incident Management
    Corridor Analysis Guidelines for Incident Management
    Lee, Sibok ;
    Krammes, Raymond A.
    1994-11-01 | PDF
    This report provides guidelines on corridor-scale analysis using corridor traffic simulation models to evaluate traffic management alternatives for freeway incidents. It focuses on identifying the analysis requirements for corridor traffic management during freeway incidents and offering guidance on how CORFLO, an available corridor traffic simulat ...
  • Urban Travel Demand Modeling Data
    Urban Travel Demand Modeling Data
    Pearson, David F. ;
    Dresser, George B.
    1994-11-01 | PDF
    This report documents an overview of the travel surveys done in Texas between 1984 and 1991 relative to the data requirements for development of travel demand models. A comprehensive review and evaluation of the methods and techniques for developing regional and zonal estimates of urban data for use in travel demand models is presented. This review ...
  • Distance Requirements for Ramp Metering
    Distance Requirements for Ramp Metering
    Sharma, Sameer ;
    Messer, Carroll J.
    1994-11-01 | PDF
    Freeway ramp metering systems are being used to alleviate urban freeway congestion. This report presents a methodology for determining the distance requirements for ramp metering for a wide range of traffic volume and freeway geometric conditions. The distance requirement for ramp metering consists of distance required for queue storage and distanc ...
  • Use of MicroSurfacing in Highway Pavements
    Use of Micro-Surfacing in Highway Pavements
    Smith, Roger E. ;
    Beatty, Colin K.
    1994-11-01 | PDF
    Micro-surfacing is a complex mixture of polymer modified emulsified asphalt cement, crushed mineral aggregate, mineral filler, water, and other additives. When designed and constructed properly, micro-surfacing can be used in thin layers as preventive maintenance and in thick layers to fill ruts as corrective maintenance treatments. Several Distric ...
  • Evaluation of MicroSurfacing Mixture Design Procedures and the Effects of Material Variation on the Test Responses
    Evaluation of Micro-Surfacing Mixture Design Procedures and the Effects of Material Variation on the Test Responses
    Andrews, Edward M. ;
    Smith, Roger E.
    1994-11-01 | PDF
    This study examined the repeatability of the International Slurry Surfacing Association (ISSA) mixture design tests by evaluating the variability of the test results obtained. Consistencies between material combinations and within a given material formulation were evaluated. The repeatability of the tests using materials falling within current micr ...
  • Development of Analytical Tools for Evaluating Operations of Light Rail AtGrade Within an Urban Signal System Interim Report 3
    Development of Analytical Tools for Evaluating Operations of Light Rail At-Grade Within an Urban Signal System: Interim Report 3
    Berry, Richard A. ;
    Walters, Carol H.
    1994-11-01 | PDF
    This report identifies and recommends measures of impact that are applicable to the operation of at-grade light rail crossings within traffic signal systems. The key point in identifying measures of impact is to maintain consistency with traffic signal measures of impacts. The recommended measures of impact include average delay and queue length. T ...
  • Development of Analytical Tools for Evaluating Operations of Light Rail at Grade Within an Urban Signal System Final Report
    Development of Analytical Tools for Evaluating Operations of Light Rail at Grade Within an Urban Signal System – Final Report
    Venglar, Steven P. ;
    Fambro, Daniel B.
    1994-11-01 | PDF
    As the engineering and planning communities continue their progress toward managed and integrated transportation systems, transit will play an increasing role. Fifteen United States cities have already selected and implemented light rail transit (LRT) as a rail transit alternative. As engineers plan and design new or expanded systems, it is essenti ...
  • Temporary Erosion Control Measures Design Guidelines for TxDOT
    Temporary Erosion Control Measures Design Guidelines for TxDOT
    Godfrey, Sally H. ;
    Long, Jana P.
    1994-11-01 | PDF
    Achieving the maximum environmental benefits of an entire project's lifetime (planning and design phase, construction and maintenance) has become an important goal for the Texas Department of Transportation (TxDOT). With the implementation of the Environmental Protection Agency's National Pollutant Discharge Elimination System (NPDES) permitting re ...
  • Temporary Erosion Control Selection TAMUBMP Computer Program
    Temporary Erosion Control Selection: TAMUBMP Computer Program
    Godfrey, Sally H. ;
    Long, Jana P.
    1994-11-01 | PDF
    Achieving the maximum environmental benefits of an entire project's lifetime (planning and design phase, construction and maintenance) has become an important goal for the Texas Department of Transportation (TXDOT). With the implementation of the Environmental Protection Agency's National Pollutant Discharge Elimination System {NPDES) permitting re ...
  • ShortRadius Thrie Beam Treatment for Intersecting Streets and Drives
    Short-Radius Thrie Beam Treatment for Intersecting Streets and Drives
    Bligh, Roger P. ;
    Ross Jr., Hayes E.
    1994-11-01 | PDF
    At sites where a driveway or secondary roadway intersects a primary roadway in close proximity to a bridge end, the available space will not accommodate a standard length of approach guardrail, and alternate treatments are required. In Study 1263, a short-radius nested W-beam treatment was developed for use at these locations. Although the design o ...
  • TCM Analyst 10 Users Guide
    TCM Analyst 1.0 User’s Guide
    Crawford, Jason A. ;
    Rao, K.S.
    1994-11-01 | PDF
    Since the passage of the 1990 Clean Air Act Amendments (CAAA), transportation planning has increased its focus on the air quality impacts of transportation improvement projects. Transportation control measures (TCMs) are possible tools for improving regional air quality as defined in the CAAA. TCMs are a collection of actions previously grouped int ...
  • Mobile Source Emission Impacts of High Occupancy Vehicle Facilities
    Mobile Source Emission Impacts of High Occupancy Vehicle Facilities
    Knowles, William E.
    1994-11-01 | PDF
    This report documents the verification and validation of two methods which estimate the potential mobile source emission reduction of high occupancy vehicle (HOV) facilities. A brief overview of HOV mobile source emission evaluation methodologies currently available for use, verification and validation of the San Diego Association of Governments' T ...
  • Overweight Permit Rules
    Overweight Permit Rules
    Keating, Peter B. ;
    Litchfield, Stephen C.
    1994-11-01 | PDF
    This document defines standards for issuing permits for overweight vehicles crossing standard H-type and HS-type Texas highway bridges. A general formula and a bridge specific formula were developed for simple spans of both bridge types. Several reinforced concrete continuous span slab bridges were then evaluated according to the proposed criteria ...
  • Investigation of Bonding Materials for Piezoelectric Traffic Monitoring Equipment
    Investigation of Bonding Materials for Piezoelectric Traffic Monitoring Equipment
    Ueber, Eric J. ;
    Fowler, David W.
    1994-11-01 | PDF
    Proper highway design requires the use of accurate traffic data. Such data are collected by traffic monitoring equipment installed in the road surface. This equipment usually consists of piezoelectric sensors, either 1.8 meters or 3.6 meters long (6 or 12 feet long), installed in a groove cut into the pavement, and held in place by a bonding agent. ...
  • Implementation Manual for the Use of Bonding Materials for Piezoelectric Traffic Monitoring Sensors
    Implementation Manual for the Use of Bonding Materials for Piezoelectric Traffic Monitoring Sensors
    Ueber, Eric J. ;
    Fowler, David W.
    1994-11-01 | PDF
    In order to properly design highway pavements, the Texas Department of Transportation (TxDOT) gathers traffic data with piezoelectric classification sensors. Use of these sensors includes the use of polymer binding materials to install the sensors in the pavement. In the past, the polymer being used by Tx.DOT proved to be inadequate. This project w ...
  • Highway Noise Abatement Measures 1994 Survey of Practice
    Highway Noise Abatement Measures: 1994 Survey of Practice
    Storey, Beverly B. ;
    Godfrey, Sally H.
    1994-11-01 | PDF
    The potential environmental impact of noise pollution from highway facilities has become a difficult problem to solve for the TxDOT planners and design engineers. Noise mitigation for projects can greatly increase their costs and public opposition. Additional right-of-way acquisition in urban areas is often cost prohibitive which limits design alte ...
  • US75 North Central Expressway Reconstruction May 1994 Traffic Conditions
    US-75 North Central Expressway Reconstruction: May 1994 Traffic Conditions
    Tyer, Kevin D.
    1994-11-01 | PDF
    This report documents the results of the May 1994 traffic data collection efforts during the fourth year of the US-75 North Central Expressway reconstruction project south of the I-635 LBJ Freeway. Traffic conditions and patterns have been monitored during October 1989 and May 1990 (before construction) and each October and May since October 1990 ( ...
  • Reduction of Sulfate Swell in Expansive Clay Subgrades in the Dallas District
    Reduction of Sulfate Swell in Expansive Clay Subgrades in the Dallas District
    Bredenkamp, Sanet ;
    Lytton, Robert L.
    1994-11-01 | PDF
    The addition of hydrated lime to clay soils is one of the most common methods of soil stabilization. However, when sulfates are present in the soil, the calcium in the lime reacts with the sulfates to form ettringite, an expandable mineral. This expansion causes a considerable amount of economical as well as structural problems. Sulfate related hea ...
  • US 75 North Central Expressway Reconstruction LemmonOak LawnPeak Screen Line Automobile User Panel May 1994 Survey Results
    U.S. 75 North Central Expressway Reconstruction: Lemmon/Oak Lawn/Peak Screen Line Automobile User Panel, May 1994 Survey Results
    Ullman, Gerald L.
    1994-11-01 | PDF
    This report presents the results of the May 1994 survey of the automobile user panel established to assist in monitoring the traffic impacts of the North Central Expressway (NCE) reconstruction in the Dallas District. Overall, researchers detected a few small changes in travel patterns and operating conditions. However, the majority of panelists co ...
  • A Method for Estimating the Remaining Life of Continuously Reinforced Concrete Pavements
    A Method for Estimating the Remaining Life of Continuously Reinforced Concrete Pavements
    Easley, Steve ;
    Dossey, Terry
    1994-11-01 | PDF
    By presenting a method for estimating the remaining life of continuously reinforced concrete pavement (CRCP), this report provides a means for determining the optimum time to overlay such pavements. Previously, determinations of remaining pavement life relied solely on engineering judgment. And while subjective experience can often lead to satisfac ...
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