§ 72.011 TURNING ON CREST OF A HILL.
   No vehicle shall be turned so as to proceed in the opposite direction upon any curve, or upon the approach to or near the crest of a grade, where the vehicle cannot be seen by the driver of any other vehicle approaching from either direction within 500 feet.
(ILCS Ch. 625, Act 5 § 11-802(b)) ('77 Code, § 71.005) Penalty, see § 70.99