信号交叉口起动波的运动学模型

为寻求一种符合实际且参数意义明确的信号交叉口起动波模型,根据起动波传播的运动学特性建立了起动波的运动学模型。设计了数据采集方案和数据处理方法。利用长春市实际调查数据标定了模型,并得到了波速计算值。按照起动波传播特性,由实际调查数据计算了波速观测值。结果表明,运动学起动波模型的波速理论值与实际观测值的相对误差约为5%。该模型不依赖于传统交通波模型,参数意义明确,标定方法简单,波速计算值与观测值接近,为城市交通信号控制提供更可靠的理论依据。

Kinematic model of start wave at signalized intersection

Based on the kinematic characteristics of the vehicle start wave propagation,a kinematic model for the vehicle start wave which accords with the reality and whose parameters are explicit was built.The data acquisition scheme and the data processing method were designed.The model was calibrated by the survey data in Changchun city and the velocity of the vehicle start wave propagation was calculated by the model.The observed velocity of the vehicle start wave propagation was obtained from the survey data directly and the corresponding derived propagation characteristics of the vehicle start wave.The relative error between the two wave velocities obtained by the kinematic model and the direct observation is about 5%.The proposed model can provide a theoretical basis for the urban traffic signal control.