Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 2841-2860 of 4147
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Freeway Traffic Flow Rate Measurement: Investigation into Impact of Measurement Time Interval
(American Society of Civil Engineers, 2003)Traffic flow rate, the equivalent hourly rate of vehicles passing a point during a given time interval, is a fundamental measure of traffic status that plays a critical role in many aspects of transportation engineering. ... -
Transit Route Network Design Using Frequency Coded Genetic Algorithm
(American Society of Civil Engineers, 2003)Transit route network design for urban bus systems involves the selection of a set of routes and the associated frequencies that achieve the desired objective, subject to the operational constraints. This can be formulated ... -
Freeway Work Zone Traffic Delay and Cost Optimization Model
(American Society of Civil Engineers, 2003)A new freeway work zone traffic delay and cost optimization model is presented in terms of two variables: the length of the work zone segment, and the starting time of the work zone using -
Frontage Roads: Assessment of Legal Issues, Design Decisions, Costs, Operations, and Land-Development Differences
(American Society of Civil Engineers, 2003)A policy of building frontage roads alongside freeway mainlanes avoids the purchase of access rights when upgrading existing highways to freeway standards and can supplement local street networks. It also may affect corridor ... -
Network Reserve Capacity under Influence of Traveler Information
(American Society of Civil Engineers, 2003)This paper provides a hierarchical framework for studying the impact of traveler information on network reserve capacity. The framework comprises a two-level mathematical program—the upper-level program maximizes the reserve ... -
Comparison of Four Modeling Techniques for Short-Term AADT Forecasting in Hong Kong
(American Society of Civil Engineers, 2003)In Hong Kong, the annual traffic census report is published in the middle of the year and used to present the results of traffic volume recorded at the automatic traffic counter stations. The type of traffic volume data ... -
Effect of Lane Width on Capacity under Mixed Traffic Conditions in India
(American Society of Civil Engineers, 2003)A new concept to estimate the passenger car unit (PCU) of different types of vehicles under mixed traffic conditions is presented. It utilizes the area, as opposed to only the length, and speed of a vehicle. Data were ... -
In-Service Performance Evaluation of Bullnose Median Barriers in Iowa
(American Society of Civil Engineers, 2003)This paper presents results of an in-service performance evaluation of the bullnose median barrier used in the state of Iowa. The data were collected in a four-county portion of Iowa during a 24-month data collection effort ... -
Visibility Effectiveness of Hemisphere and Corner Cube Retroreflective Pavement Markers on Curved Roads
(American Society of Civil Engineers, 2003)This study was conducted to investigate the visibility effectiveness of hemisphere and corner cube pavement markers on various curved road driving conditions. The study consisted of a field experiment to investigate visual ... -
Determining Traffic Stream Impacts of Radar Detectors Using Microscopic Simulation
(American Society of Civil Engineers, 2003)Police radar is known to have an effect on the speed of drivers. This effect derives from the presence of vehicles equipped with radar detectors in the traffic stream and the reactions that the drivers of these vehicles ... -
Can Single-Loop Detectors Do the Work of Dual-Loop Detectors?
(American Society of Civil Engineers, 2003)Real-time speed and vehicle-classification data are important inputs for modern freeway traffic control and management systems. However, these data are not directly measurable by single-loop detectors. Although dual-loop ... -
Simulation Modeling and Variability Assessment of Delays at Traffic Signals
(American Society of Civil Engineers, 2003)This paper presents a microscopic stochastic simulation model developed to emulate the traffic movement at signalized intersections and estimate vehicular delays including the acceleration/deceleration delay. The structure ... -
Empirical-Mechanistic Method Based Stochastic Modeling of Fatigue Damage to Predict Flexible Pavement Cracking for Transportation Infrastructure Management
(American Society of Civil Engineers, 2003)In the purely theoretical approach of pavement design, percentage fatigue cracking is related to damage in a probabilistic manner according to the Miner’s law. Two methods that are currently widely in use are based on ... -
Long-Term Performance of Stone Interlayer Pavement
(American Society of Civil Engineers, 2003)This paper presents an evaluation of long-term performance of an alternative flexible pavement design referred to here as stone interlayer pavement. This pavement design was introduced to reduce/defer reflective cracking ... -
Distributing Superelevation to Maximize Highway Design Consistency
(American Society of Civil Engineers, 2003)Several methods for distributing highway superelevation ( -
CBR Model for Freeway Work Zone Traffic Management
(American Society of Civil Engineers, 2003)A case-based reasoning (CBR) model is presented for freeway work zone traffic management. The model considers work zone layout, traffic demand, work characteristics, traffic control measures, and mobility impacts. A four-set ... -
Optimization of Ground-Penetrating Radar Data to Predict Layer Thicknesses in Flexible Pavements
(American Society of Civil Engineers, 2003)Ground-penetrating radar has been used successfully to predict layer thicknesses in flexible pavements. Currently, a time-domain method is used to measure the two-way travel time between reflections from which the layer ... -
Traffic Prediction Using Multivariate Nonparametric Regression
(American Society of Civil Engineers, 2003)The efficient control of traffic on motorways or freeways can produce many benefits, including quicker journey times, fewer pollutant emissions, and reduced driver stress. If it were possible to accurately predict the ... -
Integrated Methodology for Design of Polluted Water Control System of Road Infrastructures for Environmental Protection
(American Society of Civil Engineers, 2003)An integrated methodology is proposed for the design of polluted water control systems for road infrastructures, based on hazard analysis concepts. The case of a simultaneous rainstorm and road accident with the dispersion ... -
Impacts of Shorter Perception-Reaction Time of Adapted Cruise Controlled Vehicles on Traffic Flow and Safety
(American Society of Civil Engineers, 2003)Auto manufacturers have begun to market an adaptive cruise control system (ACCS) as an option that promotes driver safety. This paper examines how the presence of vehicles equipped with ACCS affects stability and safety ...