Journal of Transportation Engineering, Part A: Systems: Recent submissions

Now showing items 2401-2420 of 4147

    • Prediction of Road Marking Performance 

      Sven-Olof Lundkvist; Ulf Isacsson (American Society of Civil Engineers, 2007)
      From the road user’s point of view the night-time visibility of road markings during wet conditions is of great importance, and instruments aimed for mobile measurement of the retroreflectivity of road markings are available. ...

    • Operational Effects of U-Turns as Alternatives to Direct Left-Turns 

      Pan Liu; Jian John Lu; Huaguo Zhou; Gary Sokolow (American Society of Civil Engineers, 2007)
      This study analyzed the operational effects of a widely used access management treatment: using U-turns as alternatives to direct left-turns from driveways. Data were collected at 34 selected roadway segments in central ...

    • Interlock Mechanism of Concrete Block Pavements 

      Halil Murat Algin (American Society of Civil Engineers, 2007)
      The structural mechanics of interlock that causes the surface to adopt a mode of behavior similar to the conventional flexible pavements is one of the unique characteristics of the behavior of concrete block pavements. A ...

    • Improving Traffic-Noise Model Insertion Loss Accuracy Based on Diffraction and Reflection Theories 

      Ning Shu; Louis F. Cohn; Roswell A. Harris; Teak K. Kim (American Society of Civil Engineers, 2007)
      This paper investigates the physical mechanisms related to highway noise barrier insertion loss, and evaluates the accuracy of insertion loss of the existing traffic-noise model, TNM 2.5, compared to STAMINA 2.0 and field ...

    • Effectiveness of Microsurfacing Treatments 

      Samuel Labi; Geoffrey Lamptey; Siew-Hwee Kong (American Society of Civil Engineers, 2007)
      This paper determines that microsurfacing can offer average reductions of 0.442 international roughness index (IRI) [in m/km],

    • Evaluation of Damage Potential for Pavements due to Overweight Truck Traffic 

      Jeongho Oh; E. G. Fernando; R. L. Lytton (American Society of Civil Engineers, 2007)
      Higher allowable axle loads of multiaxle trucks produce severe pavement damage, which leads to raising the budget to rehabilitate deteriorated sections. To minimize expected damage, it is necessary to design pavement to ...

    • Speed Changes in the Vicinity of Horizontal Curves on Two-Lane Rural Roads 

      Alberto M. Figueroa Medina; Andrew P. Tarko (American Society of Civil Engineers, 2007)
      In some situations, the horizontal alignment of a road, particularly circular curves, are designed for reduced speeds compared to their adjacent sections to reduce costs and to avoid compromising the qualities of historical ...

    • Optimization of User and Operator Cost for Large-Scale Transit Network 

      Fang Zhao; Xiaogang Zeng (American Society of Civil Engineers, 2007)
      A methodology for optimizing transit networks based on both passenger and operator costs is presented. Given information on transit demand, street network, and a set of feasibility constraints of a transit service area, ...

    • Ordered Probit Modeling of User Perceptions of Protected Left-Turn Signals 

      Lin Zhang; Adrian Ricardo Archilla; Panos D. Prevedouros (American Society of Civil Engineers, 2007)
      There is an absence of nationally accepted warrants for left-turn phasing at signalized intersections. Some guidelines recommend a protected left-turn phasing for turns with three or more opposing through lanes. However, ...

    • Parameter Identification and Analysis of a Slab Track System Using 3D ABAQUS Program 

      Shao-Tang Yen; Ying-Haur Lee (American Society of Civil Engineers, 2007)
      The main objective of this study is to conduct in-depth investigations on the parameter identification and convergence study of slab track analysis. The idealized theoretical solutions are first investigated. Together with ...

    • Personal Cost of Auto Travel in Kuwait 

      P. A. Koushki (American Society of Civil Engineers, 2007)
      The number of autos continues to grow worldwide, in general, and in the oil-rich nations of the Persian Gulf, in particular. To most auto users, the associated cost of auto travel is that of the perceived out-of-pocket ...

    • How Modern Headlamp Performance Impacts Sag Vertical Curve Design 

      H. Gene Hawkins Jr. (American Society of Civil Engineers, 2007)
      For over 50 years, the basis for calculating the length of sag vertical curves has been the sight distance based on a

    • Nonstationary Dynamic Pavement Loads Generated by Vehicles Traveling at Varying Speed 

      Lu Sun; Feiquan Luo (American Society of Civil Engineers, 2007)
      Many of the existing studies on vehicle dynamics assume that vehicles travel at a constant speed on a homogeneous pavement surface. In this paper the effect of nonstationary surface excitation to vehicle dynamics are ...

    • Differences among Route Flow Solutions for the User-Equilibrium Traffic Assignment Problem 

      Hillel Bar-Gera; Amos Luzon (American Society of Civil Engineers, 2007)
      User-equilibrium (UE) traffic assignment is widely used in travel forecasting models. Analyses of assignment results often require detailed information about route flows. For a given UE model, total link flows are uniquely ...

    • New Look at DCP Test with a Link to AASHTO SN Concept 

      B. K. Roy (American Society of Civil Engineers, 2007)
      The dynamic cone penetration (DCP) test has emerged as a simple but effective tool for characterizing granular pavement materials and subgrades. However, DCP data tend to be used more in the converted form, e.g., as ...

    • Artificial Neural Network Speed Profile Model for Construction Work Zones on High-Speed Highways 

      Douglas R. Taylor; Saravanan Muthiah; Bohdan T. Kulakowski; Kevin M. Mahoney; Richard J. Porter (American Society of Civil Engineers, 2007)
      Speed profile models can be used as a diagnostic tool by highway engineers. Previous work has investigated relationships between operating speed and geometric roadway elements for permanent roadway conditions on predominantly ...

    • Analysis and Modeling of Simultaneous and Staged Emergency Evacuations 

      Steven I. Chien; Vivek V. Korikanthimath (American Society of Civil Engineers, 2007)
      Disaster response in areas of high population density is centered on efficient evacuation of people and/or goods. Developing evacuation plans suitable for different levels of urgency based on the intensity of threat is a ...

    • Freeway Accident Likelihood Prediction Using a Panel Data Analysis Approach 

      Yi (Grace) Qi; Brian L. Smith; Jianhua Guo (American Society of Civil Engineers, 2007)
      The ability to predict freeway accident likelihood promises significant benefits to freeway operations. However, the development of such prediction models has proven to be very challenging because of the random nature of ...

    • Highway Alignment Optimization Incorporating Bridges and Tunnels 

      Eungcheol Kim; Manoj K. Jha; Paul Schonfeld; Hong Sok Kim (American Society of Civil Engineers, 2007)
      A three-dimensional highway alignment optimization methodology is developed that automatically determines whether and where bridges or tunnels are preferable to embankments or deep cuts, respectively. This is done by ...

    • System Partition Technique to Improve Signal Coordination and Traffic Progression 

      Zong Tian; Thomas Urbanik (American Society of Civil Engineers, 2007)
      A heuristic approach to the application of bandwidth-oriented signal timing is proposed based on a system partition technique. The proposed approach divides a large signalized arterial into subsystems with three to five ...