Upon the following streets, the maximum speed of all motor vehicles, including automobiles, motorcycles and trucks, is established to be 30 miles per hour, and signs shall be posted accordingly:
(A) Harding Avenue from La Grange Road to Kemman Avenue.
(B) Kemman Avenue from Fairview Avenue to 31st Street.
(`70 Code, § 13-56) (Ord. 49, passed 2-25-64; Ord. 134, passed 7-27-71; Ord. 172, passed 4-23-74)