A great first class national road.
Tarmac is recently renewed and so are the markings on it.
The road is not used much since there is a highway the bypasses it.
It includes three different mountain passes featuring tight corners
from Saranci to Zlatica and fast ones before Koprivshitsa.
Along the road on your left is the "Stara planina" or "Balkan" mountain.
The whole Balkan Peninsula is named after it.
This gives you some spectacular views.
The road gives you access to lots of passes in the mountain like "Beklemeto", "Shipka",
"Republic's pass" and many, many more.
There is a speed-cam at the gas station after Mirkovo's intersection.