Route of lot Four:

• This lot starts from Dasht-e-Nazir Y track to Chalus with around 20 kilometers length and includes two lanes. 
• The maximum road slope is 4 percent and the minimum radius  of arcs is 450 meters.

Main operational volumes of lot Four on Round Trip Basis:

• 4   Tunnels with 1.3 Km length
•  4   Bridges with 0.5 Km length
• 11  Million m3  earth works

This lot is under operation and  in order to provide the passing cars with better services, maintenance and immunization of the freeway route are constantly being performed.