As a designer and subcontractor, Integra developed the main design with all phases for a total of 15.37 km of full motorway profile for the contractor, the consortium Spea, Safege and Radis.
The submitted project documentation at the level of the main design consisted of three sections: Vranduk-Ponirak, Nemila-Vranduk and Ponirak-Southern exit from the Zenica tunnel.
The most important structures on the route are bridge Vranduk 1 L=406.70/414.65m, bridge Vranduk 2 L=361.70/361.50m, and tunnel Zenica L=2,474.32/2,419.33m.

Client: Delegation of the European Union to Bosnia and Herzegovina