基于协调效益的交通子区划分方法研究  

Research on Traffic Sub-area Divisions based on Coordinate Benefit

作　　者：李康[1] 吕斌[1] 孙玮玮[1] 

机构地区：[1]兰州交通大学交通运输学院,兰州市730070

出　　处：《公路》2016年第3期110-114,共5页Highway

基　　金：国家自然科学基金;项目编号61463026;教育部博士点基金项目;项目编号20136204120007;甘肃省自然基金项目;项目编号1308RJZA128

摘　　要：为避免传统的交通子区划分方法中人为设定阀值造成的不合理性,在分析车流时空特性的基础上引入协调效益理想值。通过改进美国道路通行能力手册给出的关联程度公式,考虑路段距离、协调相位直行车流量、行驶速度三个主要影响因素,构造了协调程度系数计算公式。在干道协调的条件下,对协调效益进行理想值预测,与协调程度对应求出实际协调效益。利用聚类相似性思想,将具有相似性质(实际协调效益)的交叉口归入同一个交通子区。最后选取实地的8个连续交叉口为例,采用本文方法划分交通子区后的控制效果与使用干道协调控制效果进行对比,验证了本文方法的有效性及正确性。To avoid the irrationality caused by artificial threshold values in traditional traffic sub-area divisions,the expectation idea in probability theory is adapted based on the analyses of traffic flow and its spatial feature.By improving the correlation degree proposed in the America Highway Capacity Manual,three major factors are considered such as the distance,straight-going traffic load as well as speed to construct the coordinate degree factor calculation formula.Under coordinated arterial roads conditions,ideal value of coordinate benefit is predicated,and the actual coordinate benefit is worked out according to the coordinate degree.Based on the theory of clustering,the similar intersections of practical coordinate benefit are classified into a same traffic sub-area,eight continuous intersections are taken as examples and the effect of different divisions are compared thus testing and verifying the validity and correctness of the method in this paper.

关 键 词：城市交通 交通控制 聚类相似 交通子区 协调效益 

分 类 号：U491.4[交通运输工程—交通运输规划与管理]