IPSA Institut is in the phase of preparation of following Main Designs, according to signed Contract with State Ministry of transport and communications:
- LOT 1: Svilaj (north border with Croatia)–Vukosavlje, 17 km
- LOT 3: Johovac–Doboj South, 16 km

IPSA also works on Main Design for Corridor Vc Motorway section Vlakovo - Lepenica, length 9,5 km, according to Contract with Federal Office for Construction, Managing and Maintaining of Motorways.

Main Design documentation shall include following:

1.      Engineering-geological and Hydro-geological works and geotechnical project;
2.     Spatial-planning background documentation (urbanity-technical conditions);
3.     Main Design for the route and objects (tunnels and bridges) and fllowing infrastructure and objects;
4.     Environmental impact assessment (acting in accordance with environmental permission conditions);
5.     Construction works organization project and
6.      Expropriation Project.