Road traffic states estimation algorithm based on matching of regional traffic attracters

XU Dong-wei(徐东伟)^{1, 2}, DONG Hong-hui(董宏辉)^{1, 2}, JIA Li-min(贾利民)^{1, 2}, TIAN Yin(田寅) ^{1, 2}

(1. State Key Laboratory of Rail Traffic Control and Safety (Beijing Jiaotong University), Beijing 100044, China;
2. School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China)

Abstract:To effectively solve the traffic data problems such as data invalidation in the process of the acquisition of road traffic states, a road traffic states estimation algorithm based on matching of the regional traffic attracters was proposed in this work. First of all, the road traffic running states were divided into several different modes. The concept of the regional traffic attracters of the target link was put forward for effective matching. Then, the reference sequences of characteristics of traffic running states with the contents of the target link’s traffic running states and regional traffic attracters under different modes were established. In addition, the current and historical regional traffic attracters of the target link were matched through certain matching rules, and the historical traffic running states of the target link corresponding to the optimal matching were selected as the initial recovery data, which were processed with Kalman filter to obtain the final recovery data. Finally, some typical expressways in Beijing were adopted for the verification of this road traffic states estimation algorithm. The results prove that this traffic states estimation approach based on matching of the regional traffic attracters is feasible and can achieve a high accuracy.

Key words:road traffic; regional traffic attracter; traffic state; data recovery; matching