Legality varies by jurisdiction, but generally, U-turns are allowed if:

: There are no "No U-Turn" signs posted.

A is a driving maneuver that involves rotating a vehicle 180 degrees to reverse direction on the same road. It is primarily used when a driver needs to change direction quickly without finding a detour or navigating multiple intersections. When U-Turns Are Legally Permitted

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