Price of Anarchy in Transportation Networks: Efficiency and Optimality Control

Hyejin Youn, Michael T. Gastner, Hawoong Jeong
2008 Physical Review Letters  
Uncoordinated individuals in human society pursuing their personally optimal strategies do not always achieve the social optimum, the most beneficial state to the society as a whole. Instead, strategies form Nash equilibria which are often socially suboptimal. Society, therefore, has to pay a price of anarchy for the lack of coordination among its members. Here we assess this price of anarchy by analyzing the travel times in road networks of several major cities. Our simulation shows that
more » ... on shows that uncoordinated drivers possibly waste a considerable amount of their travel time. Counterintuitively,simply blocking certain streets can partially improve the traffic conditions. We analyze various complex networks and discuss the possibility of similar paradoxes in physics.
doi:10.1103/physrevlett.101.128701 pmid:18851419 fatcat:od5mn6h44baulju7wclcu5ut3u