The large part of this express route was built whilst Macedonia was a part of the SFR Yugoslavia , though it was only completed in 2004 in time for the Athens Olympics .
The large part of this express route was built whilst Macedonia was a part of the SFR Yugoslavia , with the Kumanovo - Petrovec section first opened for traffic in 1979 . 
 The motorway was fully completed in 2004 in time for the Athens Olympics .