基于OD反推的环形交叉口流向流量分析

Analysis on Flow Direction and Flux of Roundabout Based on OD Matrix Estimation

现有研究虽然有针对性地提出了一些环形交叉口流向流量分析方法,但在应用中仍存在一定的局限性,对一些复杂的大型环形交叉口无能为力。基于此,借助OD反推技术,提出了一种环形交叉口流向流量分析模型,它通过反复迭代,以右转车流量为精度控制条件,反推出环形交叉口各流向交通流量。案例分析表明,该模型具有广泛的适用性和较高的精度,实用性强,计算过程简单,能有效解决环形交叉口各流向流量的交通调查问题。

The existing researches have put forward some targeted methods to analyze traffic flow direction and flux of roundabout,however,these methods have some obvious limitations in practice which are helpless for some complicated and large roundabout. Based on this, a model for analyzing traffic flow direction and flux is presented by using the ＂OD matrix estimation＂ technology. Through repeated iteration, the flux towards every direction can be calculated when taking right-turn flux as accuracy control condition. The empirical analysis shows that this model can solve the problem of the traffic flow investigation at roundabout because of several advantages, such as strong adaptability, high precision and sim-ple calculation process.