Are you allowed to make a U-turn on a road beyond this information sign?

Why?

The blue D-9 motorway sign shown marks your entry onto a motorway. U-turns are prohibited on motorways, so you must not make one after passing this sign.

art. 22 ust. 6 pkt 2 Prawa o ruchu drogowym; znak D-9 „autostrada”, § 48 ust. 2 rozporządzenia w sprawie znaków i sygnałów drogowych