Hm
Ground markings are white. Traffic signs look european, could be italy, germany, austria , czech republich, slowakia, slovenia, swizerland... some others too. damn it, could be 2/3 of europ.
My guess: It is a 6 laned highway in the mountains, maybe the one over the Brenner:
La autostrada del brennero (A22) , Italy. Or the austrian Brennerautobahn (A13)