2-DIMENSIONAL TRAFFIC FLOW PROBLEMS IN INHOMOGENEOUS LATTICES

Cellular automaton (CA) models are presented to simulate the traffic j am in a two-dimensional traffic flow. Effects of introducing inhomogen eities in the form of sites having different time scales and overpasse s are studied using computer simulations. We present theoretical estim ates of the critical car density and the average velocity at low car d ensities, and compare with numerical results. Results suggest that str ategically adding these sites can help sustain a moving traffic at hig her car densities.