In most states, a traffic ticket can be issued to any driver who makes an illegal or unsafe u-turn. In some states, traffic laws require drivers to execute a u-turn only when it is reasonably safe to do so under the circumstances (based on the driver's ability to see approaching cars, the speed of oncoming traffic, etc.). Other states specifically prohibit drivers from making a u-turn or "turning around" on or near the crest of a hill, or near a curve that limits visibility to a few hundred feet. Finally, a driver who makes a u-turn at an intersection that has a posted "No U-Turn" sign has committed an illegal u-turn, and may receive a traffic ticket.

Illegal U-Turn: Laws in All 50 States