Phase diagrams in unidirectionally coupled map lattice for open traffic flow

The jamming transition from the free traffic to the oscillatory traffic is investigated with the unidirectionally coupled map lattice model which has the hyperbolic tangent local map. Spatio-temporal structures in the jamming transition are found with the use of numerical simulation. The traffic sta tes are studied for both constant and noisy boundary conditions. We show th e phase diagrams of different kinds of congested traffic. It is found that the noise at the boundary has an important effect on the traffic states. Th e traffic behavior in the coupled map lattice model exhibits a jamming tran sition similar to that found in the car-following model. (C) 2001 Elsevier Science B.V. All rights reserved.