基于不同车头时距分布的环形交叉口M/G/1延误模型研究

Based on the intersection of the headway distribution of different M/G/1 delay model research

在城市道路网络中,交叉口的服务水平将会对整个路网的服务水平产生一定影响。为了提高环形交叉口的运行效率,对环形交叉口的延误做了相应研究。国内外研究中已有一些延误模型例如HCM模型、Adams延误模型、M/M/1排队系统模型以及M/G/1排队系统模型等。根据M/G/1排队系统模型推导出了基于不同环道车流车头时距分布的M/G/1延误模型,将环道车流车头时距符合移位负指数分布的M/G/1模型应用于具体交叉口计算得出延误值,并与使用HCM模型、Adams延误模型计算所得的延误值以及实际延误值进行比较,得出结论。

In the city road network,influence of intersection level of service will be for the entire road network service level. In order to improve the utilization efficiency of the intersection,the research on the delay of circular intersection is done. In the domestic and foreign research,there are some delay models such as HCM model,Adams model,M/M/1 model queuing system model and M/G/1 queuing system model. According to the M/G/1queuing system model,the M/G/1 delay model is derived based on the time headway distribution of different ring road vehicles. The M/G/1 delay model whose time headway distribution of ring road vehicles accords to the shift negative exponential distribution is applied to the specific intersection for calculating delay value and compared with the delay value which is calculated by using HCM model,Adams model and the actual delay value,last come to conclusion