关键词: 智能交通, 动态估计, 动态贝叶斯网络, TAN分类器, 时间窗

Abstract: Aiming at the problem that traffic lights are weak in intelligence and easy to cause traffic jam, a time intelligent dynamic estimation method for traffic lights based on TAN classifier is proposed. Firstly, this paper analyzes the main factors which affect the traffic light time, and discretizes the collected data by fuzzy classification function. Then, it learns the structure of the TAN classifier by K2 algorithm. Next, it learns the parameters of TAN classifier with maximum likelihood estimation. Finally, the best traffic light time is estimated online by forwards-backwards algorithm based on the sliding window. The experimental simulation shows that the proposed method can dynamically estimate the optimal traffic light time according to real-time traffic information. When the traffic light is free, the traffic light time is short, otherwise, time is long. It is effective to alleviate traffic jam and reduce environment pollution.

Key words: intelligent transportation, dynamic estimation, dynamic Bayesian networks, TAN classifier, sliding window