针对当前城市道路网存在的交通拥堵问题,根据城市地面交通的特点和公交优先的原则,利用广义随机Petri网通过将变迁分为时间变迁和瞬时变迁,结合禁止弧和赋予各弧不同的优先权,构建公交优先策略模型,为实施公交优先策略提供理论依据. Aiming at the problem of traffic congestion in the current urban road network, this paper uses generalized stochastic Petri nets to classify the transition into time-varying and transient transition according to the characteristics of urban ground traffic and bus priority, , Build a bus priority strategy model, to provide a theoretical basis for the implementation of bus priority strategy.