In a very challenging part of the route, there are two single – pipe tunnels and a major road junction Čeveljuša, which is on a very muddy and very bad foundation soils. Čeveljuša road junction consists of two viaducts with a total length 392 meters and Crna Rijeka bridge length of 328 meters. All facilities are built on the concrete and steel piles length of 10 to 70 meters. Embankments in the road junction Čeveljuša are built on the gravel piles.