Research on Dynamic Control Strategies for Intermittent Bus Lanes in Mixed Traffic Flow Environments

The traditional intermittent bus lane control struggles to achieve an effective balance between bus priority and lane utilization efficiency. To address this limitation, this study proposes a dynamic control strategy that enables the borrowing of intermittent bus lanes in mixed traffic flow environments and constructs a connected vehicle control model encompassing both the target intersection and its upstream segment. First, a dynamic clearance framework is established on the dedicated lane based on the real-time speed of buses. Concurrently, the target connected and automated vehicle (CAV) predicts the traffic signal status upon its arrival at the stop line to determine its traversable zone at the bus lanes. Subsequently, a coordinated control strategy is designed for the dynamic clearance framework and the traversable zone, leading to the development of lane-changing decision models under four distinct scenarios. This approach allows CAVs to dynamically utilize residual lane resources without compromising bus operations. Finally, using average vehicle delay as the evaluation metric, a comparative simulation analysis is conducted against the traditional bus lane utilization method across four dimensions: connected vehicle penetration rate, traffic flow saturation, right-turn proportion, and bus departure frequency. The experimental results demonstrate that the proposed strategy significantly improves both bus priority and overall traffic efficiency.