Any rider of any horse, mare, or gelding, and any driver of any vehicles engaged in any contest of speed, within the limits of the City, shall be subjected to a fine of $20. City Code, 1879, art. 8, §7 1893, art. 8, §7 1927, art. 4, §7 1950, art. 38, §32 1966, art. 31, §44 1976/83, art. 31, §33 Rev. Ords. 1858-032