U-turns -

: You have a clear view of approaching traffic, typically at least 200–500 feet in both directions.

: You have a green left-turn arrow or a green light (unless a sign specifically prohibits it). U-TURNS

: There is an opening in the center divider not reserved for emergency or law enforcement vehicles. Illegal and Legal U-Turns: A Brief Guide - CarParts.com : You have a clear view of approaching

: You are in a residential district and no vehicles are within a safe distance (often 200 feet). U-TURNS