Method of signal control of urban public transit priority based on traffic flow detection at expot of upper intersection

Aimed at the case that there is no place for opening up bus lanes limited by the road conditions and traffic conditions in the center area of city, in order to carry out the signal control of urban public transit priority on these roads, the traffic flow detectors are setted up the export of upper intersection, the time interval of bus and other big vehicles to go through the stop line of downstream intersection is estimated based on the real-time collection data, a series of bus operation schema at the stop line of downstream intersection are formed by merging each bus' time interval, by comparing with the signal operation schema of arterial direction to determine the green signal extension or red light ahead of arterial direction in order to achieve urban public transit priority. Traffic simulation results show that the mean delay of all vehicles reduce and the bus' delay decrease larger in addition to the mean delay of cross-road vehicle increase.