面向大型社会活动的智能交通控制策略研究

Study on intelligent transportation control strategy of large social event

城市交通系统是由交通工具、交通路网、交通设施和交通运营管理组成的一个整体,良好的控制策略可以有效缓解道路拥堵,提高路网利用效率.为了缓解大型社会活动期间短时间交通需求激增对快速路网运营的压力,提出一种基于动态交通分配理论的智能交通控制策略.该策略以路网总运行时间最少为目标,通过宏观调节分流比例来进行优化控制,为交通控制与管理提供辅助决策依据.同时,讨论了适合模型求解的优化算法——序列二次规划算法,并针对上海快速路网特点进行仿真实验.仿真结果表明:智能交通控制策略可以有效改善路网的运行状态,减少路网的总运行时间,具有良好的实用价值.

The urban traffic system consists of traffic tools,traffic network,traffic facilities,traffic operation management,and so on.Good control strategy can relieve road congestion and improve the utilization efficiency of road network effectively.Firstly,in order to relieve freeway congestion caused by large social events,an intelligent transportation control strategy based on dynamic traffic assignment theory is presented.The strategy aims at minimizing the total spent time and is optimized by macroscopically regulating the splitting ratio,providing a assistant decision basis to traffic control and management.Secondly,the sequential quadratic programming algorithm,suitable for solving this model,is discussed.Finally,a simulation experiment aiming at the characters of freeway network in Shanghai is carried out.The results indicate that the intelligent transportation control strategy can improve the operating state of the network,reduce the total spent time effectively,and has good practical value.