Research on Bus Signal Priority Strategy for Urban Arteries Based on Real-Time Vehicle Queuing Detection

In order to reduce the influence of bus signal priority on non-priority phase, this paper takes the intersection for arterial road of urban traffic as the research object. Based on the basic theory of line control, taking the width of the green wave band of the social traffic flow in the coordinated direction of the arterial road as the limiting condition, considering the service level constraint of the coordinated intersection, based on the calculation method of the critical queue capacity, the bus priority signal control strategy is proposed. Compared with the non-priority scheme, the average delay time of bus decreases by 15.7 s, a decrease of 8.3%. The total travel time decreased by 0.68h, a decrease of 10.8%. The average delay of public transport decreased by 6.21s, a decrease of 7.6%. Compared with the scheme without considering signal priority, the proposed strategy and the strategy without considering the queuing capacity restriction reduced the total travel time by 6.0% and 4.2% respectively, and the average delay time decreased by 6.5% and 2.9% respectively. The proposed strategy can better balance the traffic efficiency of non-priority phase social vehicles.