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针对国内多条高速公路互通立交分流区进行了详细的调研工作,利用NC200检测器获得了大量的调研数据。在理论模型分析的基础上,利用χ2检验技术对分流区多个断面的车头时距统计值进行了假设检验,验证了多个断面不同交通量下车头时距的分布规律。检验统计表明当高速公路互通立交分流区交通量分别为510、508、350、294、212、78 veh/h时,移位负指数分布可较好的反映车辆车头时距的分布规律,相关研究结论为进一步的科研和设计工作提供了重要的理论基础。
Aiming at the cross-overpass areas of a number of expressways in China, a detailed investigation was carried out. A large amount of survey data was obtained by using the NC200 detector. Based on the analysis of the theoretical model, the χ2 test is used to test the statistic of the headway of multiple sections in the shunt zone, and the distribution of the headway at different cross sections is verified. The test statistic shows that when the traffic volumes in the interchange areas of highway interchange are 510, 508, 350, 294, 212, 78 veh / h respectively, the negative exponential distribution of displacement can better reflect the distribution rule of vehicle headway, The conclusion provides an important theoretical basis for further research and design work.