Any person driving a vehicle on a public road or way shall drive the same in a careful and prudent manner and at a careful and prudent speed not greater than nor less than is reasonable and proper, having due regard to the traffic, surface, and width of the public way and any other conditions then existing.
(47 O.S. § 11-801(a)) (`83 Code, § 15-527) Penalty, see § 71.999