Heavy vehicle limitation effect on freeway function software simulation

In most freeway, because of heavy vehicle and truck move, we see several accidents. Transition limitation for heavy vehicle of passenger car with using of specific lines technic is essential. This research have been compared existence and inexistence line limitation in Iran freeway. For scenarios comparison, we use VISSIM traffic stimulation software and for case study, we investigate some part of Qom-Tehran freeway. After modeling this limited area, we calibrated model. Then with effective parameters changing, we create different scenarios and then each scenario have been model building and after software enforcement, outputs have been investigated. At the end, scenarios have been compared base on traffic. Function, and advantages and disadvantages investigated for using in zran. Line limitation for heaby vehicle is fitted (4%) other than line limitation inexistence.