环放路网宏观基本图信号周期敏感性分析  

Sensitivity Analysis of MFD of Ring Radial Road Network on Signal Cycle

作　　者：马莹莹[1] 温沉 江泽浩 MAYing-ying;WEN Chen;JIANG Ze-hao(School of Civil Engineering & Transportation, South China University of Technology, Guangzhou 510640, China;Dongguan Urban Planning and Design Institute, Dongguan 523000, Guangdong, China;Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 200092, China)

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]东莞市城建规划设计院,广东东莞523000 [3]同济大学道路与交通工程教育部重点实验室,上海200092

出　　处：《交通运输系统工程与信息》2019年第5期78-85,93,共9页Journal of Transportation Systems Engineering and Information Technology

基　　金：广东省自然科学基金(2018A030313250);广东省教育厅特色创新项目(2017KTSCX005)~~

摘　　要：为揭示路网宏观基本图(MFD)对信号周期的敏感性,首先,提出一种基于GMM的宏观基本图建模方法,并在此基础上提出路网运行效率和稳定性的表征方法;其次,提出MFD对信号周期敏感性的仿真实验设计方法;再次,以环放路网为例,进行仿真实验,分析信号周期的变化对MFD的影响,进一步揭示信号周期对路网运行效率和稳定性的影响机理.结果表明,合理的信号周期对MFD和路网的效率及稳定性影响不大,但周期过大或过小则对MFD和路网的运行效率及稳定性造成较大影响.该结论可以为路网交通控制和优化提供依据.To reveal the sensitivity of macroscopic fundamental diagram (MFD) of road network on signal cycle, this paper firstly proposed an MFD modelling method based on GMM, and then proposed a characterization method of road network operation efficiency and stability. Secondly, a simulation experimental design method for sensitivity of MFD on signal cycle was proposed. Thirdly, taking the ring radial road network as example, a simulation experiment was carried out to analyze the influence of signal cycle on MFD and further, the influence mechanism of signal cycle on road network operation efficiency and stability was revealed. The results indicate that the MFDs efficiency and stability of road network are less affected by reasonable signal cycle length, but are more affected by too large or too small cycle length. This conclusion provides a basis for road network traffic control and optimization.

关 键 词：交通工程 宏观基本图 高斯混合聚类 信号周期 敏感性分析 

分 类 号：U491.54[交通运输工程—交通运输规划与管理]