Corsim & Vissim models are traffic stimulation packages used frequently as analytical tools for traffic. These traffic simulations packages have effective approaches to quantify the benefits as well as limitations of different alternatives. The concern is to watch if the critical design decision making is appropriate. This is because many models have their very luttle information about accuracy. When the simulation models become easier to use, more than one model can ne used in some studies. The typical two model study analysis were made to make the results more accurate & reasonable. These analysis also gave a good confidence. The two models study illustrated the value of utilising a performance range along with sensitivity analysis. The two model study generally proved the value of providing a significant comparative information before making any designing decision. The results for two models analysis & studies were very accurate, reliable, reasonable & consistent. The ultimate product was clear, defensible & arrived at well supported conclusions. The experience gained was much unique in the study area of two models analysis. This experience can provide an insight for other transportation professionals with applying these two models to similar kind of networks. One of the characteristics these both models have is these models are contrasted.
