This paper presents a transit signal priority (TSP) model designed to benefit both bus riders and passenger-car users. The proposed method, mainly for headway-based strategy, provides a reliable way to determine the optimal green extension duration in response to multiple priority requests from different bus routes. Also, a basic method for queue length estimation is presented to evaluate the impacts of TSP control on passenger cars. The control objective is to minimize bus passenger waiting time at the downstream bus stop, simultaneously ensuring the total person delay of entire intersection is not increased. Using the microscopic simulation, the proposed strategy has shown its benefits in reducing bus passenger waiting time and total intersection delay.
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