Simulation Study of Traffic Operation in Some Roundabouts in Karbala Government

This research aims to evaluate and analyze the traffic performance of some roundabouts in the Karbala government, which suffer from clear problems in performing their design planning, especially at peak traffic times, as they suffer from major problems in the smooth running of traffic, which requires the intervention of the traffic police. The PTV Vissim program was used to build a model that simulates reality in most of its dimensions. The result of the research was the appearance of a significant delay in traffic which lead to a decrease in the service level to its lowest levels This makes it necessary for real intervention in developing a plan to reduce the problem of the performance of the Roundabout and reduce the worsening of the problems with the progress of time.