A U-turn in
driving refers to performing a 180 degree rotation in order to reverse direction of travel. It is called a "U-turn" because the maneuver looks like the letter
U. In some areas, the maneuver is illegal, while in others it is treated as a more ordinary turn, merely extended. In still other areas lanes are occasionally marked "U-Turn only".
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DIETRO FRONT. INVERSIONE DI MARCIA. INVERSIONE DI ROTTA. VOLTAFACCIA. FARE DIETRO FRONT. FARE UN VOLTAFACCIA. INVERTIRE LA ROTTA [NAUTICA]