机非混行交叉口右转机动车行程时间计算方法

为了定量地研究混合交通交叉口右转机动车通过交叉口的延误时间,用行程时间来表征延误,即用右转机动车的实际行程时间与不受干扰时行程时间的差值表示右转机动车的延误。从分析四相位信号交叉口右转机动车与直行自行车之间的冲突规律入手,描述了非机动车在交叉口的运行特性。应用排队论和间隙理论,建立了机非冲突交叉口右转机动车行程时间模型,同时以右转机动车流率和直行自行车流率为自变量建立了右转机动车行程时间的二元回归模型。以石家庄调查数据为基础,对这两个模型进行了验证,结果表明,排队论和间隙理论只适用于自行车流量较小的情况,而二元回归模型适用范围较广,并通过F检验证明了模型的可靠性。

Calculation method of travel time of right-turn vehicle at motor-and nonmotor-vehicle mixed traffic intersection

In order to investigate quantitatively the time delay of the right-turn vehicles at the motor- and nonmotor-vehicle mixed traffic intersection, the time delay was characterized by the travel time, namely, the difference between the actual travel time of the right-turn vehicle and that without any interference. From the analysis of the conflict between the right-turn motor-vehicle and the straight-going bicycle at the 4-phase signal intersection, the running behavior of the nonmotor-vehicle was established. Applying the queue theory and the gap theory, a travel time model of the right-turn motor-vehicle at such intersections. Then a dualistic regression model for the travel time of the motor- vehicle was derived taking the flow-rates of the right-turn motor-vehicles and the straight-going bicycles as 2 independent variables. These 2 models were verified by the survey data in Shijiazhuang city, and the results show that the queue theory and the gap theory are only suitable for the condition of low bicycle flow rate and the dualistic regression model is applicable to broader conditions, and the latter is validated by the F-test.