Abstract
One of the open problems in traffic flow theory is to describe the flow of two-way traffic on a two-lane road. The problem offers many natural complexities such as hills, curves, intersections and speed zones. Although such factors are important from an applied standpoint, they tend to obscure the intriguing aspect of the problem: the manner in which the interaction between the two lanes affects the flow in each. As an aid to developing a theoretical description of this interaction, we have constructed a computer simulation in which the behavior of individual cars is modeled directly. The purpose of this paper is to describe this simulation and to present sone numerical results obtained with it. /author/.