U-turns -

The general rule is that U-turns are legal unless a sign prohibits them, but many jurisdictions have specific "hidden" restrictions:

: Many cities prohibit U-turns in business districts except at designated intersections. Safe Execution Techniques U-TURNS

: U-turns are typically banned on highways, at railroad crossings, and on curves or hills where you cannot see oncoming traffic from at least 500 feet away (1,000 feet in rural areas). The general rule is that U-turns are legal

A U-turn is a 180-degree rotation of a vehicle to reverse direction. While common, they are strictly regulated and can be dangerous if performed incorrectly. at railroad crossings