A framework of real-time traffic information system

  • Authors:

  • Hsun-Jung Cho;Chien-Lun Lan;Yow-Jen Jou;Ming-Chorng Hwang;Tsu-Tian Lee

  • Affiliations:

  • Department of Transportation, National Chiao Tung University, Hsinchu, Taiwan;Department of Transportation, National Chiao Tung University, Hsinchu, Taiwan;Institute of Statistics, National Chiao Tung University, Hsinchu, Taiwan;Department of Shipping and Logistics Management, Kainan University, Taoyuan County, Hsinchu, Taiwan;Department of Electrical and Control Engineering, National Chiao Tung University, Hsinchu, Taiwan

  • Venue:
  • MATH'05 Proceedings of the 8th WSEAS International Conference on Applied Mathematics
  • Year:
  • 2005

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Abstract

In this paper, a framework of real-time macroscopic traffic simulation is proposed. Real-time traffic simulation using macroscopic traffic flow model on freeway have been studied and implemented in the past. We introduced a framework of implementing real-time traffic simulation on urban network. To implement the simulation on an urban network, the estimation of origin-destination (O-D) matrix must be considered. Thus the framework consists of 1) Path generation, 2) Dynamic Origin-Destination Estimation and 3) Link Dynamics. Path generation is based on the Wardrop's user equilibrium concept and modified convex combination algorithm. State space model is used in dynamic O-D estimation, while the LWR model is used to describe the macroscopic traffic flow in Link Dynamics. This study implements the simulation with real-time traffic input and predict traffic condition in real-time. An empirical example is conducted on a real network consists of 91 nodes and 244 links.