Research on the Division Method of Signal Control Sub-Region Based on Macroscopic Fundamental Diagram

The macroscopic fundamental diagram (MFD) provides a method to evaluate macro traffic operation through micro parameters, which can be applied control prevent congestion transfer and improve road network efficiency. However, due the large scale of urban as well complex temporal spatial distribution congestion, application MFD for signal first requires partition network. Based on analysis purposes, set methods based graph theory was designed. Firstly, used transform network; secondly, minimum spanning tree divide map. Moreover, attribution link between connected regions is determined. Our solve problem ambiguous intersection ownership, sections belonging same in opposite directions are separated. This has ability size area by limiting number intersections; Finally, evaluation index regional clustering results drawn. To achieve research objective, we collected processed vehicle information data from Xuzhou car-hailing platform obtain density information. Then, selected an with sufficient enough empirical value range obtained comparing values multiple groups measurement k indexes. In this process, it found that during period flat peak transition, while average changes, uniformity decreases then increases. improved controlling area. We compared them two kinds traditional algorithms dichotomy algorithms. improves balance 5% over existing methods.