Practical Research on Auxiliary Lane Controlling Traffic Lane Distribution

This paper verified the ways to control traffic lane distribution at several auxiliary lane sections in uninterrupted flow to enlarge the capacity at bottlenecks, in macroscopic manners and quantitatively, by using traffic detector data. The effect of auxiliary lane placement to reduce congestion was evaluated in termsof its length or the distance from its end to the bottleneck downstream. The temporary auxiliary lane emerged during the intensive maintenance works in Tomei Expressway. Thus, both volume and velocity lane distributions were analyzed to evaluate its effect to mitigate congestion.