This four-lane freeway is about 23 kilometers long in the mountainous area of the Alborz mountains in the east of Tehran, between the end of the Babai highway and the west of Bumehen. This project was developed due to the increase in quality and the significant reduction of travel time and traffic transfer and the income from toll collection is one of the most successful freeway projects in Iran. This consulting engineers have been honored to receive the title of top consultant in the 18th national conference of the American International Concrete Institute (ACI) Iran branch in February 2019 for conducting designing and suprtvisions of this .project