It is unlawful for any person traveling upon any bicycle, coaster, sled, toboggan, skiffs, roller skates or riding in or by means of any coaster or toy vehicle, to cling to or attach himself in any manner to any other moving vehicle upon any street, alley, highway or bridge within the city, and no operator or driver of any automobile, truck, wagon, sleigh, dray or other vehicle or conveyance shall permit or allow any person to cling to or attach himself to such conveyance, or to hold onto the outside thereof in any manner while such vehicle is in motion, or attach any bicycle, motorcycle, coaster, sled, toboggan, skiffs or any other coaster or toy vehicle to such automobile, truck, wagon, sleigh, dray or other vehicle being driven or operated by him. This prohibition shall not be construed to apply to trailers attached to automobiles, trucks or other vehicles or conveyances for commercial or business purposes. (Ord. A-85, 12-5-1955)