Abstract
Here we study how a traffic jam spreads on complex networks when driven
by an increasing flux between certain initial and final points. For that
purpose, we developed two new traffic models based on vehicular traffic
and applied them on the Apollonian network and the Swiss road network.
The first model is an electrical analog, using ohmic and non-ohmic
resistors which is a classical approach in Physics while the second one
which we call the herding model, is based on human driving behavior. For
both models, we study the sequence of clogged roads up to the traffic
gridlock and display the fragilities of the network. In the electrical
model, by increasing the external potential, resistors burn out, as the
voltage drop between the ends increases above a certain threshold.
Analyzing both models, we observed some power-law functions that occur
only near a traffic gridlock as well as the dependence on topological
features of the network and influence on flux and the robustness in
Apollonian networks of different generations. (C) 2011 Elsevier B.V. All
rights reserved.
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