(A) Where no special hazards exist, motor trucks and motor truck tractors of a size greater than 1 tons shall obey signs posted giving notice of special conditions.
('86 Code, § 18.228)
(B) No person shall drive any vehicle equipped with solid rubber or cushion tires at a speed greater than a maximum of ten miles per hour.
('86 Code, § 18.231) Penalty, see § 70.99