PARTICLE HOPPING MODELS FOR 2-LANE TRAFFIC WITH 2 KINDS OF VEHICLES -EFFECTS OF LANE-CHANGING RULES

We develop particle-hopping models of two-lane traffic with two differ ent types of vehicles (characterized by two different values of the ma ximum allowed speed V-max) generalizing the Nagel-Schreckenberg stocha stic cellular-automata model for single-lane traffic with a single V-m ax. The simplest of the two models is symmetric with respect to the tw o lanes as well as with respect to the two types of vehicles. In the a symmetric model, different rules govern the changing from the ''fast'' lane to the ''slow'' one and the reverse process. Moreover, in the as ymmetric model, the drivers of fast vehicles can anticipate, often wel l in advance, the possibility of getting trapped behind a slow vehicle and tend to avoid such possibilities.