Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 2541-2560 of 4147
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Structural Performance Monitoring of an Unstabilized Fly Ash-Based Road Subbase
(American Society of Civil Engineers, 2006)Beneficial utilization of stabilized fly ash as a structural layer in pavement construction is a common practice in the United States. At the same time, application of untreated and unstabilized fly ash in such cases is ... -
Evaluation of Foamed Asphalt Cold In-Place Pavement Recycling Using Nondestructive Techniques
(American Society of Civil Engineers, 2006)In light of the increasing cost of hot-mixed asphalt mixtures and the limited availability of good materials, cold in-place recycling using foamed asphalt stabilization offers an attractive alternative for rehabilitating ... -
Upstream Signalized Crossover Intersection: An Unconventional Intersection Scheme
(American Society of Civil Engineers, 2006)The impact of left turns on operation is probably the most significant factor in the performance of conventional intersections. As a result engineers have looked to alternative measures for dealing with left turns at ... -
Multivariate Simulation and Multimodal Dependence Modeling of Vehicle Axle Weights with Copulas
(American Society of Civil Engineers, 2006)Safety assessment and rational design of bridge structures requires the uncertainty associated with vehicle loads to be modeled as accurately as possible. This modeling is rendered difficult by the presence of vehicle axle ... -
Reliability Analysis of Deflection of Buried Flexible Pipes
(American Society of Civil Engineers, 2006)The in situ behavior of buried flexible pipes is considerably influenced by uncertainties in external load, pipe, and soil properties. To take care of the uncertainties, while the conventional design methodology incorporates ... -
UTW Behavior on Asphalt Pavements Tested with HWLS
(American Society of Civil Engineers, 2006)The objective of this research is to evaluate how the physical properties and thickness of asphalt pavements influence behaviors of ultra thin whitetopping (UTW). The results of the three-dimensional finite-element method ... -
Influence of Pedestrians’ Entry Process on Pedestrian Delays at Signal-Controlled Crosswalks
(American Society of Civil Engineers, 2006)The writers claim that the process of pedestrians’ entry to the signal-controlled crosswalk can affect the values of pedestrian delays. The existing models have been based on some typical situations and would not always ... -
Effects of Traffic Characteristics and Mounting Location on the Visibility of On-Premise Commercial Signs
(American Society of Civil Engineers, 2006)In recent years, there has been a movement in local government regulations toward restricting the mounting height of on-premise, commercial signing and other roadside oriented signs. This has caused some concern among sign ... -
Implementation of Automated Travel-Time Information and Public Reaction on Urban Highway Rehabilitation
(American Society of Civil Engineers, 2006)Transportation agencies are becoming more aware of the seriousness of traffic delay caused by urban freeway rehabilitation and are experimenting with the use of intelligent transportation systems to control traffic demand ... -
Assessing Damage to Airport Pavement Structure due to Complex Gear Loads
(American Society of Civil Engineers, 2006)The Federal Aviation Administration’s National Airport Pavement Test Facility (NAPTF) was constructed to generate high-quality, full-scale accelerated test data from pavements subjected to dynamic simulated heavy aircraft ... -
Collecting Driving Data to Support Mobile Source Emissions Estimation
(American Society of Civil Engineers, 2006)This paper describes a new sampling approach to collect driving data. Traditional data collection assesses the percentage of vehicle miles traveled by road facility and time of day, and collects data in proportion to how ... -
Improved Design for Vision-Based Incident Detection in Transportation Systems Using Real-Time View Transformations
(American Society of Civil Engineers, 2006)Advances in machine vision techniques have led to algorithms and integrated systems that can be applied in transportation engineering to improve surveillance and control. Despite these advances, certain problems in the ... -
Utilizing Clustering Techniques in Estimating Traffic Data Input for Pavement Design
(American Society of Civil Engineers, 2006)This paper presents an objective approach for establishing similarities in vehicle classification and axle load distributions between traffic data collection sites. It is based on clustering techniques that identify in ... -
Simplified Methodology to Estimate Emissions from Mobile Sources for Ambient Air Quality Assessment
(American Society of Civil Engineers, 2006)Vehicle emissions from mobile sources are major contributors to air pollution and air quality degradation in the United States. The inventory of these emissions is a key component in ambient air quality assessment and air ... -
Accuracy of Ground-Penetrating Radar for Pavement-Layer Thickness Analysis
(American Society of Civil Engineers, 2006)This paper deals with accuracy issues related to using ground penetrating radar (GPR) for determining the surface layer thickness of asphalt and concrete pavements. Additionally, tests were conducted to identify GPR’s ... -
Rational Approach for Base Type Selection
(American Society of Civil Engineers, 2006)The objective of this study was to investigate how base materials should be properly selected for specific types of pavement, considering not only the performance of individual layers but also how they interact in the ... -
Determination of Required Falling Weight Deflectometer Testing Frequency for Pavement Structural Evaluation at the Network Level
(American Society of Civil Engineers, 2006)Recently, a structural condition index (SCI) was developed for the Texas Department of Transportation as a screening tool to discriminate between pavements that need structural reinforcement from those that do not. For the ... -
Correlation of Aggregate Test Parameters to Hot Mix Asphalt Pavement Performance in Hawaii
(American Society of Civil Engineers, 2006)The long-term performance of HMA pavements is strongly dependent on the characteristics of the aggregate in the mixture. The set of aggregate specification tests currently in use by the Hawaii Department of Transportation ... -
Evaluation of Early Strength Requirement of Concrete for Slab Replacement Using Accelerated Pavement Testing
(American Society of Civil Engineers, 2006)Five full-size concrete replacement slabs were constructed and tested by a heavy vehicle simulator (HVS) at 6 h after concrete placement to study the early strength requirement of concrete for slab replacement. Stress ... -
Actuated Signal Operations of Congested Diamond Interchanges
(American Society of Civil Engineers, 2006)Actuated signal operations for congested conditions were evaluated with a simulation study at diamond interchanges. Both three-phase and four-phase with two-overlap phasing strategies were employed, with four ramp spacings ...