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 such vehicle cannot be seen by the driver of any other vehicle approaching from either direction within 500 feet.
RSA 265:43
RSA 262-A:40. 1963, 330:1. 1981, 146:1, eff. Jan. 1, 1982.