[1] The road travels through the provinces of Tehran, Markazi, Isfahan, Fars, and Bushehr.

Covering a total of 1,208 kilometers, it is the sixth longest route in the country.

Saadatshahr Tunnel, located between Saadat Shahr and Qaderabad, was closed for repairs and lighting related works from 22 November 2011 to mid-February 2012.

[3] The road is under construction to be improved to 2+2 expressway.

[4] There are plans to build another 2 lanes and make the road a 4-lane expressway.