Jam phases in a two-dimensional cellular-automaton model of traffic flow

Abstract

The jam phases in a two-dimensional cellular-automaton model of traffic flow are investigated by computer simulations. Two different types of jam phases are found. The spatially diagonal long-range correlation obeys a power law at the low-density jam configurations. The diagonal correlation exponentially decays at the high-density jam. The exponent of the short-range correlation in the diagonal direction is introduced to define the transition between these two phases. We also discuss the stability of the jams.