The multiphase dynamics in urban traffic systems

We focus on multiphase dynamics in urban traffic systems based on Level-Of-Service (LOS). For our purpose, the dynamics of traffic flow on roads determines the probability of LOS value; and the stochastic property of LOS value determines the time-varying property of the structures´ scales of dynamic traffic networks and the difference of degree distributions further. Furthermore, the experiments on the Beijing road traffic system show that the system has the phase of structural randomness, even the scale-free phase at some rush hours.