In order to solve the problem of road traffic congestion in urban central area, this paper explores the influence of different bus lanes on traffic operation. In this paper, the detector will be used to identify the operation status of public transport vehicles in real time, and traffic data will be obtained by bayonet electronic police, RFID, GPS, baidu map and field volume, including road layout, intersection distribution, public transport facilities, roadside parking, etc., as well as the distribution of infrastructure such as intersection signal timing scheme and bus priority signal timing. Finally, taking the intersection group of Qianjin Road and Changjiang Road in Kunshan City as an example, VISSIM simulation is carried out from three locations of right turn lane bus only entrance lane, through lane bus only entrance road and left turn lane bus only entrance road, and explores the optimization scheme. It is concluded that in the case of moderate traffic volume, the setting of right turn lane bus only entrance lane can ensure the priority of buses, and has the least impact on traffic flow.