Limitation on U-turns -- turning on curve or crest of grade prohibited. An operator of a vehicle may not turn the vehicle to proceed in the opposite direction:
- unless the movement can be made safely and without interfering with other traffic; or
- upon any curve or upon the approach to or near the crest of a grade where the vehicle cannot be seen by the operator of any other vehicle approaching from either direction within 500 feet.
See Montana/Special roads for guidance in Montana that may not be universal to all other states and territories.