Realization of Bidirectional A* Algorithm Based on the Hierarchical Thinking During the Process of Path Planning

Efficient shortest path algorithm in road networks plays an important role in car navigation system. This paper brings forward the bidirectional A* algorithm based on the hierarchical thinking. Simultaneously, improved the data structure of A* algorithm and the expanded mode of nodes, greatly reduced the running time and scale of algorithm search, enhanced the speed and accuracy of path planning.