Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 2601-2620 of 4147
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Changes in Asphalt Pavement Friction Components and Adjustment of Skid Number for Temperature
(American Society of Civil Engineers, 2005)The results of a study aimed at investigating the effects of temperature and surface texture on the friction force developed at the tire–pavement interface during skidding are presented. Ten field sites representing a ... -
Video-Capture-Based Approach to Extract Multiple Vehicular Trajectory Data for Traffic Modeling
(American Society of Civil Engineers, 2005)This paper presents a methodology for extracting vehicular trajectory data using a video-capture technique, and describes a computer-based tool, Vehicle Video-Capture Data Collector ( -
Improved Speed Estimates from Freeway Traffic Detectors
(American Society of Civil Engineers, 2005)This paper presents an analytical methodology to increase the accuracy of speed estimates from freeway traffic detectors by integrating information across lanes. Typically these estimates are quite noisy due to unobserved ... -
Review of Pavement Design and Analysis by Yang H. Huang
(American Society of Civil Engineers, 2005) -
Practical, Interactive, and Object-Oriented Machine Vision for Highway Crack Sealing
(American Society of Civil Engineers, 2005)This paper discusses a machine vision system that is used to find pavement cracks for a robotic crack sealing machine. The system includes a high-resolution digital camera which captures live or still images of the robot’s ... -
Count Data Models for Trip Generation
(American Society of Civil Engineers, 2005)Count data models are established to overcome the shortcoming of linear regression model used for trip generation in conventional four step travel demand forecasting. It should be checked if there are overdispersion and ... -
Balancing Efficiency and Equity of Ramp Meters
(American Society of Civil Engineers, 2005)An efficient ramp control strategy may not be politically attractive due to its negative impacts on equity. This paper addresses this issue and presents a new objective for ramp metering—minimizing weighted travel time—which ... -
Examining the Quality of Synthetic Origin–Destination Trip Table Estimated by Path Flow Estimator
(American Society of Civil Engineers, 2005)Path flow estimator (PFE) is a one-stage network observer proposed in the transportation literature to estimate path flows and path travel times from traffic counts in a transportation network. The estimated path flows can ... -
Multiobjective Entropy Transportation Model with Trapezoidal Fuzzy Number Penalties, Sources, and Destinations
(American Society of Civil Engineers, 2005)In this paper, we have considered a multiobjective transportation problem with an additional entropy objective function. Here the cost coefficients of objective functions, the source, and destination parameters are trapezoidal ... -
Modeling Operating Speed and Speed Differential on Two-Lane Rural Roads
(American Society of Civil Engineers, 2005)The geometric features of a highway network play a significant role considering the fact that collisions occur disproportionately on horizontal curves. Based on extensive literature review, the problem mainly stems from ... -
A Framework for Assessing Models that Rank Highway-Rail Grade Crossings for Improvement
(American Society of Civil Engineers, 2005)In the Midwest, three states in recent years have re-examined their grade crossing model. Illinois conducted a study that developed a new model, the expected accident frequency formula, using a nonlinear regression analysis ... -
Fishing for Safety Information in Murky Waters
(American Society of Civil Engineers, 2005)There is a large and growing literature on road safety. Unfortunately, not all that is published is sound. This puts on the reader the onus of deciding what to believe. To help the reader, three common sources of error are ... -
Hierarchical Bayesian Estimation of Safety Performance Functions for Two-Lane Highways Using Markov Chain Monte Carlo Modeling
(American Society of Civil Engineers, 2005)A critical part of any risk assessment is identifying how to represent exposure to the risk involved. Recent research shows that the relationship between crash count and traffic volume is nonlinear; consequently, a simple ... -
The Road Ahead
(American Society of Civil Engineers, 2005)Our road safety future is shaped by decisions that affect the amount of trip making, mode of travel used, kinds of infrastructure on which travel takes place, vehicle fleet, technology in use, and the prevailing norms of ... -
Is There a Future for the Federal Surface Transportation Program?1
(American Society of Civil Engineers, 2005)The issues related to the reauthorization of the Federal Surface Transportation Program are critically reviewed and the factors that affect the continued viability of the program are discussed. A look to the future trends ... -
Real-Time Estimation of Accident Likelihood for Safety Enhancement
(American Society of Civil Engineers, 2005)Unlike conventional traffic safety studies that focused on histrionic data analyses, this study attempts to identify traffic conditions that might lead to a traffic accident from real-time freeway traffic data. An innovative ... -
Context-Sensitive Design: Issues with Design Elements
(American Society of Civil Engineers, 2005)Well-designed roadways should equally consider and address safety, mobility, and community needs. The concept of context sensitive design is an emerging project development and geometric design approach that aims to meet ... -
Crash Comparison of Single Point and Tight Diamond Interchanges
(American Society of Civil Engineers, 2005)Although the single point interchange (SPI) has been around for approximately -
Guidelines for Performance Assessment of Digital Imaging Systems Used in Highway Applications
(American Society of Civil Engineers, 2005)Digital imaging systems installed in automated highway evaluation vehicles are generally designed on a modular basis where system components produced by various manufacturers are assembled to customize the system and fulfill ... -
Empirical Study of Traffic Features at a Freeway Lane Drop
(American Society of Civil Engineers, 2005)Traffic was studied upstream and downstream of a bottleneck that arose near a freeway lane drop near London, U.K. using archived high-resolution loop detector data. The bottleneck’s location and mean discharge flows were ...