TY - JOUR
T1 - Percolation transition in dynamical traffic network with evolving critical bottlenecks
AU - Li, Daqing
AU - Fu, Bowen
AU - Wang, Yunpeng
AU - Lu, Guangquan
AU - Berezin, Yehiel
AU - Stanley, H. Eugene
AU - Havlin, Shlomo
PY - 2015/1/20
Y1 - 2015/1/20
N2 - A critical phenomenon is an intrinsic feature of traffic dynamics, during which transition between isolated local flows and global flows occurs. However, very little attention has been given to the question of how the local flows in the roads are organized collectively into a global city flow. Here we characterize this organization process of traffic as "traffic percolation," where the giant cluster of local flows disintegrates when the second largest cluster reaches its maximum. We find in real-time data of city road traffic that global traffic is dynamically composed of clusters of local flows, which are connected by bottleneck links. This organization evolves during a day with different bottleneck links appearing in different hours, but similar in the same hours in different days. A small improvement of critical bottleneck roads is found to benefit significantly the global traffic, providing a method to improve city traffic with low cost. Our results may provide insights on the relation between traffic dynamics and percolation, which can be useful for efficient transportation, epidemic control, and emergency evacuation.
AB - A critical phenomenon is an intrinsic feature of traffic dynamics, during which transition between isolated local flows and global flows occurs. However, very little attention has been given to the question of how the local flows in the roads are organized collectively into a global city flow. Here we characterize this organization process of traffic as "traffic percolation," where the giant cluster of local flows disintegrates when the second largest cluster reaches its maximum. We find in real-time data of city road traffic that global traffic is dynamically composed of clusters of local flows, which are connected by bottleneck links. This organization evolves during a day with different bottleneck links appearing in different hours, but similar in the same hours in different days. A small improvement of critical bottleneck roads is found to benefit significantly the global traffic, providing a method to improve city traffic with low cost. Our results may provide insights on the relation between traffic dynamics and percolation, which can be useful for efficient transportation, epidemic control, and emergency evacuation.
KW - Emergence
KW - Percolation
KW - Traffic
UR - http://www.scopus.com/inward/record.url?scp=84922215051&partnerID=8YFLogxK
U2 - 10.1073/pnas.1419185112
DO - 10.1073/pnas.1419185112
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C2 - 25552558
AN - SCOPUS:84922215051
SN - 0027-8424
VL - 112
SP - 669
EP - 672
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 3
ER -