Application of VISSIM in Signal Timing of Ring Intersection

The ordinary ring intersection is only suitable for the situation with little traffic volume. Along with the fast increase of traffic volume, traffic jams often occur at ring intersections. Utilizing some traffic simulation techniques to seek a reasonable signal timing scheme is an effective method to solve this problem. Taking the ring intersection at Bell Tower of Xi′an as an example, optimized signal timing scheme is proposed with the help of traffic simulation software VISSIM, and then the scheme is evaluated. The results of analysis indicate the scheme can reduce the vehicle delay and improve the traffic capacity of the ring intersection effectively, which validate that applying microcosmic simulation software VISSIM in signal timing of ring intersection is feasible.