城市交通流诱导信息板配置优化方法

为合理进行城市交通流诱导,提出了一种基于提高诱导覆盖率和减小诱导重复率双重约束下的信息板配置优化方法。在分区的道路网络条件和交通需求点分布确定的情况下,以追求分区内被诱导的交通量最大为前提,建立信息板优化布局函数,并通过遗传算法设计了信息板优化布局函数求解算法,在提高整个诱导覆盖率和减少诱导重复率的双重约束下确定信息板的合理数量。通过一个15个节点的网络实例验证,当设置6块信息板时,诱导重复率为1.000,且其诱导覆盖率也达到了0.978,为最优配置。结果显示该信息板配置方法能在一定交通诱导重复率的基础上达到交通诱导覆盖率最大,是一种提高交通流诱导效率的有效方法。

Optimization method of configuration of traffic flow guidance information board in urban

In order to distribute traffic flow guidance information board(TFGIB) in urban properly,the optimization model of configuration of TFGIB was put forward based on the restriction of improving guidance coverage rate and reducing guidance repeat rate.The layout optimization function of TFGIB to maximize the guiding rate of traffic volume was established on the presumption that road network condition and traffic demand area were ensured,the algorithm of the layout function was designed on the basis of genetic algorithm,and the reasonable quantity of TFGIB was confirmed under the restriction.The model was proved through a road network with 15 nodes.It is pointed that when 6 TFGIB are collocated in the net,the guidance repeat rate is 1.000,the guiding coverage rate reaches 0.978,and it is optimal configuration.The result indicates that the method can get the maximum guiding coverage rate under determinate guiding repeat rate,and is an effective method to improve traffic guidance efficiency.2 tabs,4 figs,9 refs.