Except as otherwise provided herein, no person shall operate or cause to be operated upon any public street within the city any commercial motor vehicle, truck-tractor, trailer, semi-trailer or any combination thereof which has a capacity in excess of one ton, according to the manufacturer’s rating, except on such street or streets as are designated as truck routes by this article; such vehicles shall be operated on a truck route wherever reasonably practicable.
(1964 Code, sec. 27-75(a))