Switch between critical percolation modes in city traffic dynamics
Abstract
With the same static road network, it is essentially unknown for urban traffic if traffic flows have the same spatial organization properties for different hours. Based on real-time high-resolution GPS data on the city scale, our results indicate two distinct modes characterized by different percolation critical exponents. The mode during rush hours on working days behaves like a 2D lattice with mainly short-range links, while the mode for other instants behaves like a small world (i.e., a lattice with long-range links). The difference between these two modes is explained here by the free flow on urban highways during nonrush hours, which is like adding long-range links in a 2D lattice. In contrast, during rush hours, such links almost disappear.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 27, 2018
- Source ID
- 10.1073/pnas.1801545116
Entities
People
- Daqing Li
- Guanwen Zeng
- H. Eugene Stanley
- Liang Gao
- Shengmin Guo
- Shlomo Havlin
- Ziyou Gao
Organizations
- Bar-Ilan University
- Beihang University
- Beijing Jiaotong University
- Boston University
- Defense Threat Reduction Agency
- National Natural Science Foundation of China