In half of its length, between Shumen and Varna, it is superseded by Hemus motorway (A2).

The road bypasses Ruse, the fifth largest city in Bulgaria, and then runs southeast.

It crosses the small town of Tsar Kaloyan, bypasses Razgrad and continues towards Shumen, the 10th largest city in Bulgaria.

[1] At the Belokopitovo interchange, road I-2 links with the Hemus motorway (A2).

[2] Between Shumen and the Black Sea coast at Varna, the second largest city in Bulgaria, the road runs parallel to Hemus motorway as a 2-lane single carriageway.