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›› 2018, Vol. 40 ›› Issue (10): 1223-1229.doi: 10.19562/j.chinasae.qcgc.2018.010.015

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Optimal Path Programming Algorithm with Consideration of Signalized Intersection Delay

Hu Lin1,3, Zhong Yuanxing1,3, Huang Jing2, Du Ronghua1,3, Zhang Xin1,3   

  1. 1.School of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114;
    2.Hunan University, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha 410082;
    3.Changsha University of Science and Technology, Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha 410114
  • Received:2017-09-06 Online:2018-10-25 Published:2018-10-25

Abstract: An optimum path programming algorithm is proposed in this paper with consideration of waiting time at signalized intersections. Firstly through the collection of floating vehicle data by GPS and matching with electronic map, the average vehicle speed and traveling time at each road section are calculated real time. Then the probability model of traffic lights at intersections is constructed based on Markov chain, and by adopting vehicle-to-infrastructure communication technique, the position and phase timing information of traffic lights at each intersection are obtained in advance and the vehicle speed is optimized when vehicle is approaching intersection. Next, vehicle runs through the intersection in acceleration is considered as an extension of green phase, with which the waiting time model of vehicle fast passing through intersection is constructed, and based on this and A* algorithm, an improved A* algorithm is put forward. Finally a simulation is conducted with a road network in Changsha city as an example, and the results show that the travel time from starting point to destination obtained with the improved A* algorithm is obviously shorter than that with traditional A* algorithm

Key words: optimal path algorithm, cooperative vehicle-infrastructure system, signalized intersection, waiting time