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Foreword The ability to model vehicular flows in traffic networks under real-time information, and to provide system users with route guidance information, constitute essential methodological components required to support the successful operation of Advanced Traveler Information Systems and Advanced Traffic Management Systems. This report describes the(More)
This paper focuses on the relationship between the content of VMS messages and driver route diversion rates. Presumably, if different message contents to describe the same situation prompt different diversion rates, then message content can be used as a control variable by the traffic controller to generate favorable network conditions in the real-time(More)
The traditional surrogate measures of safety (like number of vehicles in dilemma zone) fail to quantify the risk of crash. Traffic conflict has been proposed as an improved surrogate measure of safety for operations at isolated intersections to quantify the risk. This paper develops a dilemma zone hazard function estimating procedure to obtain the(More)
—One key technology of intelligent transportation systems is the use of advanced sensor systems for on-line surveillance to gather detailed information on traffic conditions. Traffic video analysis can provide a wide range of useful information to traffic planners. In this context, the object-level indexing of video data can enable vehicle classification,(More)
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Traffic video analysis can provide a wide range of useful information such as vehicle identification, traffic flow, to traffic planners. In this paper, a framework is proposed to analyze the traffic video sequence using unsupervised vehicle detection and spatio-temporal tracking that includes an image/video segmentation method, a background(More)
August 10-15, 2003 Abstract Due to similarities in terms of network structure and interactions among them, most infrastructure systems can be viewed as coupled layers of a generalized transportation network in which the passenger, freight, data, water, and energy flows are the commodities in the different layers. The coupling is due to the varying degrees(More)
Dilemma Zone Design as a Marginal Cost-Benefit Problem" (2007). One control objective at high-speed isolated intersections is to provide safe phase transition by minimizing the occurrence of high-speed vehicles in the dilemma zone before the phase is terminated. An upper limit for extending the green (maximum green time) is used to avoid an indefinite(More)
This paper presents an H-infinity filtering approach to optimize a fuzzy control model used to determine behavior-consistent (BC) information-based control strategies to improve the performance of congested dynamic traffic networks. By adjusting the associated membership function parameters to better respond to nonlinearities and modeling errors, the(More)