Roundabout Feasibility for Improving a University Campus Intersection, Using Microscopic Traffic Simulation Approaches

摘要

This paper introduces a roundabout feasibility study for improving a stop-controlled university campus intersection located at University of South Alabama. The roundabout feasibility is evaluated based on two primary goals: 1) traffic performance, and 2) safety. A microscopic traffic simulation was conducted to assess the traffic performance of the roundabout. The result shows that the intersection improvement with a roundabout significantly upgrades the intersection Level of Service (LOS) and can accommodate forecasted future traffic conditions. In addition, the roundabout can significantly reduce the intersection crash. It is also expected through a cost-benefit analysis that the roundabout would pay for itself in the very near future with continuation of the cost savings for the traffic delay and crash reduction after its implementation.