As time goes by,the need of transportation demand a better service quality, so the basic needs of traffic like : safe,smooth,comfortable,and economics can be fulfilled. To determined the roundabout performance,need to do research about geometric and also the vehicles that rust past the traffic. The data analisyt was conducted using simulator program which is PTV vissim where existing condition in the field are simulated by software PTV vissim for analyze roundabout performance, then use the alternative 1 (current closure) and alternative 2 (the combination between current closure and traffic light) for knowing the defference between exixting condition with that 2 alternatives. The result of existing condition analisys that queue length 104,41 m, vehicle delay 71,35 second, and level of servis F. And the result from alternative 1 condition current closure that queue length are 88,96 m from 104,41 m, vehicle delay 77,25 from 71,35 second, and level of service F. And result from the alternative 2 combination of traffic light and current closure that queue length 83,36 m, vehicle delay 60,3 second, level of service E.