城市快速路匝道连接段车头时距分布模型  

Headway Distribution Model in Urban Freeway

作　　者：裴玉龙[1] 高晗[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150090

出　　处：《交通与计算机》2007年第5期4-7,共4页Computer and Communications

基　　金：国家自然科学基金项目资助(批准号:50578056);高等学校博士学科点专项科研基金项目资助(批准号:20030213030)

摘　　要：在总结、分析现有车头时距分布规律及威布尔分布函数特性的基础上,建立了快速路匝道连接段车辆车头时距分布模型,并就参数估计的图形法和解析法进行讨论,解析法能够直接应用于交通流车头时距威布尔分布模型参数估计。运用实际匝道连接段数据进行验证,结果表明,三参数威布尔分布描述快速路匝道连接段车头时距分布规律较为理想,其对于高密度交通流描述效果较负指数分布、爱尔朗分布等具有明显优势。Vehicle＇s headway distribution model was established for traffic flow at urban freeway ramp junctions, based on the analysis of current headway distribution models and Weibull distribution model. Then, the graphic method and analytic method to evaluate the parameters were discussed. The analytic method could be directly used to evaluate three parameters of vehicle＇s headway Weibull distribution model. Finally, the model was validated with the data collected from on-ramp junction. The results show that Weibull distribution of three parameter can suitably describe vehicle＇s headway distribution regularity. Especially, it is much better than Negative Exponential distribution model, Erlang distribution model. And others in describing traffic flow with high density.

关 键 词：车头时距 交通流 威布尔分布 匝道连接段 

分 类 号：U491[交通运输工程—交通运输规划与管理]