Determining the Optimum Distance of Continuous Flow Intersection Using Traffic Micro-simulation

Continuous flow intersection is one of the unconventional intersections, which are displaced the right turn bay to the opposite side of the oncoming through traffic called Leg. The signals at the main intersection and the sub intersection are operated by two-phase fixed time signal controllers with a proper signal coordination to provide smooth traffic flow. The distance between the main intersection and the sub intersection is one of the main factors that influences to the capacity of CFI. Using VISSIM micro simulation, distances between main intersection and sub intersection for different traffic conditions were explained. Specifically, it indicated that more entering intersection traffic volume created more traffic delay at the intersection and that needed more distance on the CFI right turn crossing point from the main intersection. In addition, based on the case study at the Khon Kaen City Gate intersection, it clearly showed that both two - legs and four - legs CFI options are a good solution for traffic congestion relief at this intersection. This therefore needs a further study to solve this issue.