Fig. 2.

Robustness of the traffic dynamic network. (A and B) Breakdown of traffic clusters under a given value of removed fraction (q = 0.55) at the same morning instance during different days. A shows a holiday, while B shows a working day. (C) The number of functional traffic clusters (with high speed) as a function of time. The result is averaged over 12 d off and 17 working days. (D) Percolation process [i.e., the giant component of city traffic at a rush hour time on the above holiday (squares) and working day (circles)].