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Chinese Journal of Management Science ›› 2024, Vol. 32 ›› Issue (12): 140-152.doi: 10.16381/j.cnki.issn1003-207x.2021.2452

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Research on Autonomous Driving Control Mechanism and Vehicle Scheduling in Smart City Based on Global Perspective

Kunpeng Li(), Xuefang Han   

  1. School of Management,Huazhong University of Science and Technology,Wuhan 430074,China
  • Received:2021-11-27 Revised:2024-01-16 Online:2024-12-25 Published:2025-01-02
  • Contact: Kunpeng Li E-mail:likp@mail.hust.edu.cn

Abstract:

As policy guidance and automatic driving technologies mature and popularize, unmanned driving has become an important development trend of smart city traffic, which will lead to a dramatic change in the control logic of urban traffic. Currently, both manual driving and automated driving are essentially on a local decision traffic mode based on the perspective of the individual vehicle, e.g., a single vehicle planning its own route and making decisions about collision avoidance. In future smart cities, global scheduling of urban traffic resources and vehicles based on a global perspective will maximize the efficiency of the smart city, and will also become a new mode of traffic operation in a driverless environment. In this mode, the urban traffic control platform uniformly plans the driving route, decides the time of arrival at each intersection and the collision avoidance scheme. In view of this, firstly, the smart city traffic development blueprint is drawn from the aspects of global scheduling mechanism, road network environment and collision avoidance rules. The mode is then defined as a multi-level unmanned vehicle-simultaneous scheduling broken line routing problem considering the number of turns in irregular road network. To solve the problem, a mathematical model with the goal of “the shortest total running time + the least number of turns” is established. To quickly obtain a high-quality scheduling scheme, three optimization strategies are proposed to improve A* algorithm. Finally, 80 scale instances are set up to simulate the road network environment. 32 small-scale instances are used to assess the accuracy of the model and the efficiency of the algorithm, and 48 large-scale instances are used to compare the performance of the traditional A-star algorithm and the algorithm proposed in this paper. Results show that the algorithm proposed in this paper can reduce the number of turns to 1/2 of the traditional A* algorithm, and shorten the overall time of the vehicles to be scheduled by 0.49 h. Especially in large-scale problems, the reduction of the number of turns and the total time-saving effect are more significant. Compared with the traditional A* algorithm, the modified algorithm can reduce the average solution time by 0.061s. The research results can provide decision support for urban traffic management departments to plan and control future traffic and design global scheduling schemes.

Key words: smart city, unmanned driving, global scheduling, path planning, improved A-star algorithm

CLC Number: