Nowadays, computer simulation is widely used in industries to support decision-making and performance enhancement. Real situations often require optimal solutions in the presence of multiple constraints. Present study aims to solve a transportation problem with the help of simulation modeling. Different kind of models are investigated using multiple iterations to reduce vehicle cycle and waiting time at roundabout intersection. Discrete Event Simulation (DES) is done to compare base model against two alternatives, while, ARENA soft ware is used for data analysis and computations. Results indicated that the alternative 2 of round about only is the best option considering cycle time, waiting time and number of vehicles transferred out of the system. Findings are beneficial to improve traffic flow at similar intersections, where commuters face long waiting time during peak hours.