In China bicycles are commonly used for commuting. Mixed traffic of automobiles and bicycles is not only the main characteristic of urban traffic, but also the main reason for the decrease of capacity and the increase of delay at intersections. By studying the different states of bicycles goingthrough an intersection, this paper divides the conflicts between bicycles and vehicles into two stages. In the first stage, previously queued turning vehicles and bicycles are released at the onset of green light and theconflicts with bicycles are heavy, and turning vehicles and bicycles are analyzed using bicycle occupancy in the conflict area for this stage. In the second stage, vehicles and bicycles are arriving to the intersection randomly after initial queues are discharged and gap acceptance consideration is used to analyze the conflict between turning vehicles and bicycles inorder to obtain saturation flow reduction factor for turning vehicles. The result of this study can supplement the content of signalized intersection capacity analysis method in HCM 2000 and provide the basis for design of intersection signal timing and capacity calculation under mixed traffic conditions at signalized intersections.
Samenvatting