Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 2341-2360 of 4147
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Movement Nature of Speed-Flow Relationship on Congested Expressway
(American Society of Civil Engineers, 2008)The nature of congested traffic flow has been not fully understood until now. An isolated bottleneck on the expressway generally influences a limited segment length, which means attenuation effects of the bottleneck on ... -
Wet-Pavement Hydroplaning Risk and Skid Resistance: Analysis
(American Society of Civil Engineers, 2008)This paper presents a numerical simulation of the wet-pavement skid resistance reduction process as the sliding speed of a locked wheel increases. The development of the three-dimensional finite-element model used for the ... -
Risk-Based Volume Warrants for Free Right-Turn Lanes on Two-Lane Roadways
(American Society of Civil Engineers, 2008)Establishing warrant conditions for auxiliary free right-turn lanes is not only a policy concern but an engineering judgment that should be based on sound engineering principles. This paper presents a new methodology for ... -
Spatial Analysis of Weather Crash Patterns
(American Society of Civil Engineers, 2008)Spatial statistical techniques can be an effective tool for analyzing patterns and autocorrelation in crash data, especially weather-related crashes. Since weather is a geographic phenomenon, it tends to show distinct ... -
Effects of Mix Design Variables on Mechanical Properties of Hot Mix Asphalt
(American Society of Civil Engineers, 2008)Compaction of hot mix asphalt after the laydown process is one of the critical steps of construction affecting the service performance of asphalt concrete. It is known that compaction is controlled by a number of mix design ... -
Semiprepared Airfield Characteristics at Higher Elevations
(American Society of Civil Engineers, 2008)During combat in April 2004, the Defense Department airdropped -
Analysis of Level of Service at Airport Departure Lounges: User Perception Approach
(American Society of Civil Engineers, 2008)This technical note proposes and applies a methodology to analyze the level of service at departure lounges of airport passenger terminals, according to user perceptions. One hundred and twenty passengers were observed and ... -
Dynamic Panel Data Model for Predicting Performance of Asphalt Concrete Overlay
(American Society of Civil Engineers, 2008)In order to identify the improvement needs on transportation facilities and the associated budget, the transportation agencies need to have a reasonable estimate of the facilities’ future condition. Using asphalt concrete ... -
Influence of Restricted Sight Distances on Permitted Left-Turn Operation at Signalized Intersections
(American Society of Civil Engineers, 2008)Adequate sight distance is an important factor needed to provide safe and efficient operation of left-turn movements at signalized intersections. This factor becomes more crucial for left turners attempting this maneuver ... -
Methodology to Evaluate the Effects of Access Control near Freeway Interchange Areas
(American Society of Civil Engineers, 2008)Access connections and signalized intersections within the functional area of an interchange can adversely impact safety and operations at the interchange crossroad and on the freeway, and can cause the interchange to fail ... -
Comparison of Stress and Strain States in Pavements with and without Reflective Cracks
(American Society of Civil Engineers, 2008)Comparison of stresses and strains in pavements with and without reflective cracking is presented. The series of finite-element numerical simulations were carried out for several types of flexible pavements and overlays ... -
Empirical and Analytical Investigation of Traffic Flow Regimes and Transitions in Signalized Arterials
(American Society of Civil Engineers, 2008)The paper presents a methodological framework that integrates different data-driven techniques in order to detect the different traffic flow regimes (free flow, congested conditions, and so on) observed in signalized ... -
Comparing the Performance of Bus Routes after Adjusting for the Environment Using Data Envelopment Analysis
(American Society of Civil Engineers, 2008)Public transit managers strive to attain multiple goals with tightly constrained resources. Ratio analysis has evolved into a powerful tool for dealing with these goals and constraints. Ratio analysis provides analytical ... -
Road Design for Future Maintenance Problems and Possibilities
(American Society of Civil Engineers, 2008)This paper presents an investigation conducted to identify obstacles that prevent sufficient consideration of future road maintenance needs during the road planning and design phase. The investigation focuses on the road ... -
What Exacerbates Injury and Harm in Car–SUV Collisions?
(American Society of Civil Engineers, 2008)Concern over collisions between passenger cars and sport utility vehicles (SUVs) is growing, as more SUVs enter the market. However, little is known about the different roles that car drivers and SUV drivers play in such ... -
Continuity Equation Validation for Nonhomogeneous Traffic
(American Society of Civil Engineers, 2008)The continuity equation involving traffic flow expresses the relationship between density, flow, and speed. Density equals the flow divided by space mean speed. The formulation of this equation in the year 1952 has two ... -
Model-Based Approach to Synthesize Household Travel Characteristics across Neighborhood Types and Geographic Areas
(American Society of Civil Engineers, 2008)Household travel survey data are crucial in regional travel demand analysis. However, good quality data are not always available owing to financial constraints, privacy concerns, poorly designed sampling schemes, and/or ... -
Assessment of the Suitability of Microsimulation as a Tool for the Evaluation of Macroscopically Optimized Traffic Signal Timings
(American Society of Civil Engineers, 2008)In practice, traffic signal timings are derived using macroscopic tools that are essentially deterministic. Traffic flows, signal phasing, and street geometry are processed to deliver optimized signal timings. Objective ... -
Planning Level Regression Models for Prediction of Crashes on Interchange and Noninterchange Segments of Urban Freeways
(American Society of Civil Engineers, 2008)The need for safety assessment tools for long-range transportation planning at statewide and metropolitan levels received serious recognition when the Transportation Equity Act for Twenty First Century established a ... -
Development of Professional Driver Adjustment Factors for the Capacity Analysis of Signalized Intersections
(American Society of Civil Engineers, 2008)Various factors are provided in the