Asymmetric effect of route-length difference and bottleneck on route choice in two-route traffic system

• We extended the symmetric two-route traffic model to the asymmetric case.
• We studied the asymmetric effect of route-length difference and bottleneck on the route choice and the traffic behavior.
• We clarified the dependence of the travel time and route choice on the route-length difference and bottleneck.

We study the traffic behavior in the asymmetric two-route traffic system with real-time information. In the asymmetric two-route system, the length on route A is different from that on route B and there exists a bottleneck on route A. We extend the symmetric two-route dynamic model to the asymmetric case. We investigate the asymmetric effects of the route-length difference and bottleneck on the route choice with real-time information. The travel time on each route depends on the road length, bottleneck, and vehicular density. We derive the dependence of the travel time and mean density on the route-length ratio. We show where, when, and how the congestion occurs by the route choice in the asymmetric two-route system. We clarify the effect of the route-length ratio on the traffic behavior in the route choice.