不同运行方式下高速公路交通流特征对比  

Contrast among Traffic Flow Characteristics Under Different Operation Modes on Freeway

作　　者：段力[1,2] 过秀成[1] 姚崇富 余俊 

机构地区：[1]东南大学交通学院,南京210096 [2]华中科技大学土木工程与力学学院,武汉430074 [3]武汉市城市管理委员会,武汉430010

出　　处：《交通运输工程与信息学报》2014年第4期49-53,共5页Journal of Transportation Engineering and Information

基　　金：国家自然科学基金(51208222);江苏省交通科学研究计划项目2011-Y-30

摘　　要：六车道及以上高速公路可实行混合行驶和分车型分车道行驶等不同的运行方式,为了掌握其效果并合理选用,需对比它们的交通流特征。选择年日均交通量(AAOT)较为接近但运行方式不同的两条六车道高速公路,统计分析在高峰期0.5 h内的车型分布、交通量、速度和车头时距数据。结果表明,在分车型分车道行驶时,大量货车向车道3转移,使各车道的交通量更均匀,同时,车道1、2的平均速度提高,车头时距更加离散,而车道3的速度下降,车头时距更加紧密。这说明分车型分车道行驶实际上是对车道进行差异化管理,内、外侧车道分别以提高服务水平和通行能力为主要目标。但是,混行在同一车道上的不同车型,速度差异进一步增大,应严格禁止不按规定车道行驶的行为。Mixed traffic strategy as well as the lane restriction strategy can be implemented on freeway with at least six lanes. To grasp their effects and make a reasonable choice, the traffic flow characteristics under different operation modes must be compared. Hete we select two six-lane highways that their annual average day traffic volumes were very closed and operation modes were different, then observed their traffic flow data, and added up the vehicle types, traffic volumes, speeds and headway distribution characteristics for 0.5 h in the peak periods. After the implementation of the lane restriction strategy, vehicles of different types were concentrated respectively, traffic in each lane was more uniform, the average vehicle speeds in lane 1 and lane 2 were increased and the headways were more dispersal, while the vehicle speeds of lane 3 declined and the headways were more compact. The lane restriction strategy is a technique to carry out differentiation management among different lanes. It goal is to improve the service level and capacity respectively of the inner, the outer lanes. But, the behavior disobeying the strategy should be forbidden for the reason of safety.

关 键 词：公路运输 交通流 数理统计 六车道高速公路 车道限制 差异化管理 

分 类 号：U491.112[交通运输工程—交通运输规划与管理]