车道限制策略下八车道高速公路交通流特征  

Characteristics of Traffic Flow on 8-lane Freeway under Lane Restriction Strategy

作　　者：段力[1,2] 过秀成[1] 姚崇富 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]华中科技大学土木工程与力学学院,湖北武汉430074

出　　处：《公路交通科技》2014年第4期125-129,共5页Journal of Highway and Transportation Research and Development

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

摘　　要：为掌握车道限制策略的实施效果,应用某八车道高速公路非高峰期和高峰期的实测数据,对交通量、速度和车头时距等3项交通流参数的特征进行分析,并得出结论。限制货车通行的车道1、2比不限货车的车道3、4交通量大且速度高,说明限制货车对于提高车道的服务水平有明显效果。车道1、2的车头时距用M3分布拟合效果较好,车道3、4用2阶爱尔朗分布或移位负指数分布拟合效果较好,说明前者易结成车队,而后者的行驶自由度相对较大,交通量仍有提升空间。综上所述,车道限制策略实质上是对车道进行差异化管理,限制货车和不限货车的车道分别以提高服务水平和通行能力作为首要目标,以期获得整体运行质量的优化,但实施条件和保障机制仍有待探索。To get the effects of lane restriction strategy, the characteristics of volume, speed and headway based on the measured data at peak period and off-peak period on an 8-lane freeway are analyzed. It is concluded that （ 1 ） compared to lane 3 and lane 4 that do not restrict trucks, lane 1 and lane 2 that restrict trucks have larger volumes and higher speeds, showing that the restriction of trucks can obviously promote the level of service on those lanes; （2） the headways on lane 1 and lane 2 fit M3 distribution well while the headways on lane 3 and lane 4 fit 2-order Erlang distribution or shifted negative exponential distribution well, showing that the vehicles in lane 1 and lane 2 are prone to form queues, while the vehicles in lane 3 and lane 4 have more flexibility, so the volume of lane 3 and lane 4 still can be increased. Above all, lane restriction strategy is a technique to carry out differentiation management among different lanes. In order to optimize the systematic operation effects, the lanes that restrict trucks and do not restrict trucks take the improvement of level of service and capacity as their main objectives respectively. But the precondition and the safeguard mechanism of lane restriction strategy should be explored.

关 键 词：交通工程 交通流 数理统计 八车道高速公路 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]