Abstract
Two-lane traffic model equivalent to extended Burgers cellular automaton (EBCA1) model is studied. The flow and configuration of vehicles on two lanes are investigated and three kinds of metastable local congested states are found on the density-flow diagram. (1) The first is the stable 8tate in time where vehicles advance by stop-and-go on their own lanes without lane change. (2) The second is that where they advance changing lanes periodically. (3) The third is that where they advance changing the lane, which induces fluctuation of the flow with extremely long period. The metastable flows may correspond to the synchronized states observed in the traffic flow on expressway.
