If you are an adventurer and like to see natural and other beauties along the way, then we recommend a trip through Paracin, Zajecar and Knjazevac. This section is for the most part an excellent highway and is well maintained.
However, if you want to get to Stara Planina in the most efficient way, we recommend a trip through Nis, Svrljig and Knjazevac. If you decide to travel that route, the road is 110 kilometers long, with good vertical and horizontal signalization. This route is regularly maintained and is always passable, so it is the best choice for coming, with the recommended caution due to the ice on the road.
Be sure to fill the tank on the highway, because in the last 50 km you will not come across any gas station.