In the period from 2016 to 2021 IPSA INSTITUTE successfully performed services of the supervision of the works on the highway on corridor Vc, section Donja Gračanica – Drivuša, subsection Klopče – Donja Gračanica. The client in this project was the PJ Motorways of the FBIH. The investment value of the project was €140 mil.

Project characteristics:
Construction of the 6 km long Klopče – Donja Gračanica motorway. The following structures form the major features of this section:

• Bridge Babina rijeka range 110 + 165 + 110 m, with pillars height of 76 m, free cantilever construction method;
• Viaduct Pehare, range 30 + 8 * 40 + 30m;
• Viaduct Ričice range 36 + 2 * 48 * 36m, pillar height up to 36m;
• Viaducts of Klopče and „Klopačke stijene“ and extension of the „Babina rijeka“ bridge on the left traffic lane, underpass Klopče,
• Tunnel Ričice, L=514 m
• Tunnel Pečuj, L=1.050 m.

Electrical works: 20kV/0.4kV sub-stations, tunnel lighting, tunnel safety systems, fibre optic cables along the route, changeable message signs, video surveillance, radio wave propagation in the tunnel, fire alert system, remote control and management of traffic signs and tunnel systems
Mechanical works: ventilation in tunnels and sub-stations.
The project implementation is in accordance with FIDIC Conditions of Contract (Red Book).