Since a progression of science and technology in last decades, a number of traffic computer programs has been developed to help traffic engineers for simulating various existing road problems and examining future improvements of intersections. This software contributes important roles in the processes of analysis, evaluation, improvement and design of traffic junctions in terms of enhancement of level of service and congestion reduction. However, several limitations have been observed and discussed in the current article. These limitations need to be taken into consideration by professional engineers and other companies who are interested in the field of traffic engineering and development of simulation software. As a result, more data is needed to be collected for calibrating and validating the micro-simulation models.