Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 2221-2240 of 4147
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Comparison of Cyclic Triaxial Behavior of Unbound Granular Material under Constant and Variable Confining Pressure
(American Society of Civil Engineers, 2009)Cyclic stresses due to passing wheels impose an accumulation of permanent strains in layers of unbound granular materials (UGMs) of flexible pavements. The hollow cylinder triaxial test would be the most appropriate test ... -
Potential Freeway Congestion Severity Measure: Impact of Continuous Congestion Patterns
(American Society of Civil Engineers, 2009)To better understand the characteristics of traffic congestion and efficiently employ congestion measures for interstate highway systems, this study examined the limitations of the congestion measures currently in use such ... -
Analysis and Development of a Passive Mechanical Vibration Abatement Device for Traffic Monitoring Cameras
(American Society of Civil Engineers, 2009)Departments of Transportation throughout the United States and elsewhere employ close-circuit television (CCTV) cameras for roadway monitoring as part of increasingly sophisticated traffic management systems. Cameras used ... -
Effect of Mixture Characteristics on Cooling Rate of Asphalt Pavements
(American Society of Civil Engineers, 2009)This paper is aimed at estimating the time available for compaction of a hot-mix asphalt mixture during night construction. Laboratory tests were conducted on dense-graded and porous asphalt (PA) mixtures to evaluate their ... -
Pavement Preservation Optimization Considering Multiple Objectives and Budget Variability
(American Society of Civil Engineers, 2009)Pavement preservation programming often involves multiple objective considerations. Traditional single-objective optimization frameworks consider one single objective while imposing competing objectives as constraints in ... -
Numerical and Experimental Assessment of Advanced Concepts to Reduce Noise and Vibration on Urban Railway Turnouts
(American Society of Civil Engineers, 2009)The short service life of rail turnouts and the related noise and vibration disturbance, are directly related to their dynamic distress. Especially in the case of urban rail systems, such problems are amplified due to the ... -
Optimization of Speed Control Hump Profiles
(American Society of Civil Engineers, 2009)In this study, the goal attainment method is implemented for the optimization of speed control hump profiles. Basic dimensions for a number of hump profile functions are optimized for single vehicles classified in five ... -
CalBack: Enhancing Caltrans Mechanistic-Empirical Pavement Design Process with New Back-Calculation Software
(American Society of Civil Engineers, 2009)In 1996, California Department of Transportation (Caltrans) initiated an extensive project to develop mechanistic-empirical (ME) pavement design and analysis tools, which will help state design engineers incorporate the ... -
Influence of Intersection Geometrics on the Operation of Triple Left-Turn Lanes
(American Society of Civil Engineers, 2009)Triple left-turn lanes have been used to reduce vehicle delays, queue lengths, and left-turn storage bays at signalized intersections with relatively higher left-turn demand. Limited research has been conducted to study ... -
Multibody Dynamics Approach to the Modeling of Friction Wedge Elements for Freight Train Suspensions. II: Applications
(American Society of Civil Engineers, 2010)This paper presents an application of multibody dynamics with unilateral contact to model the friction wedge interaction with the bolster and the side frame. The new friction wedge model is a three-dimensional, dynamic, ... -
Proportion-Based Format System for Freeway and Expressway Guide Signs
(American Society of Civil Engineers, 2010)The -
Formulation and Solution Approaches to the Rail Maintenance Production Gang Scheduling Problem
(American Society of Civil Engineers, 2010)The rail industry spends billions of dollars each year on maintenance and renewal of its track infrastructure. The scheduling of these maintenance projects is extremely complex, with numerous hard and soft cost trade-offs ... -
Single-Stage Integer Programming Model for Long-Term Transit Fleet Resource Allocation
(American Society of Civil Engineers, 2010)The writers present a procedure for resource allocation among transit agencies for transit fleet management, specifically focusing on the purchase of new buses and rebuilding of existing buses. The model is formulated as ... -
Multibody Dynamics Approach to the Modeling of Friction Wedge Elements for Freight Train Suspensions. I: Theory
(American Society of Civil Engineers, 2010)This paper presents a theoretical application of multibody dynamics with unilateral contact to model the friction wedge interaction with the bolster and the side frame. The objective of the proposed approach is to produce ... -
Toward Monte Carlo Simulation-Based Mechanistic-Empirical Prediction of Asphalt Pavement Performance
(American Society of Civil Engineers, 2010)The mechanistic-empirical study of pavement performance requires that immediate pavement responses due to tire loading be mechanistically computed for pavement structures, and the long-term pavement performance be related ... -
Development of Railway Track Geometry Indexes Based on Statistical Distribution of Geometry Data
(American Society of Civil Engineers, 2010)In this paper, the statistical distribution of railway track geometry data is investigated using a significant volume of field data. Analyzing the results yields a general pattern for the statistical distribution of the ... -
Proper Presentation of Flow-Speed-Density Plots of Large Data Sets
(American Society of Civil Engineers, 2010)Flow-speed-density plots are widely used by transportation professionals. The traditional presentation of these plots can be misleading, especially when large data sets are used. An improved presentation is suggested and ... -
Toll Plaza Merging Traffic Control for Throughput Maximization
(American Society of Civil Engineers, 2010)A simple real-time merging traffic control concept is proposed for efficient toll plaza management in cases where the total flow exiting from the toll booths exceeds the capacity of the downstream highway (or bridge, or ... -
Interrater Reliability of Manual Pavement Distress Evaluations
(American Society of Civil Engineers, 2010)Many government agencies are faced with the challenge of pavement evaluation and maintenance as part of their pavement management systems. These agencies perform or contract manual or automated distress surveys over the ... -
Using Fuzzy Logic and Expert System Approaches in Evaluating Flexible Pavement Distress: Case Study
(American Society of Civil Engineers, 2010)Fuzzy logic and expert system techniques are effective in evaluating the flexible pavement distress. Distress classification has usually been performed by visual inspection of the surface of the pavement or from the data ...