Sažetak
This paper presents preliminary design preparation for road tunnels on the Trans- European Vc Corridor motorway, section Mostar North – South Border (LOT 4), which passes through Bosnia and Herzegovina. Total length of above mentioned section is 67, 3 km, 14 km being in tunnels (which is about 21% of total length of the section). The challenges faced by the designers were obvious, especially due the fact that the Corridor route mostly passes through difficult, mountainous terrain. Due to this fact, 16 road tunnels of different lengths and crosssections had to be designed, in a total length of tunnel tubes of approx. 29 kilometers. Therefore it can be concluded that the tunnels represent the key part of the section Mostar North – South Border (LOT 4) of the Trans-European Vc Corridor motorway which passes through Bosnia and Herzegovina.