The spread of car-manufacturing industry on one hand and the progress of road construction on the other hand have caused heavy traffic jams in inter-city roads, which in turn, would increased driving incidents and given rise to transit costs. In view of this, construction of freeway as a proper solution for increase of travel safety and traffic capacity and decrease of the costs of fuel, car dilapidation, etc., was taken into account by road construction industry. The strategic location of the Islamic Republic of Iran in the region and the passage of East-West and North-South transit corridors through the country on one hand, and economic, political and cultural developments and progresses of the country on the other hand, have doubled the necessity of spread of the country’s freeway network in order to increase national revenues, safety and comfort of road travels and decrease energy costs, goods finished price and so on.