Every motor truck having an unladen weight of four thousand (4,000) pounds or more and every truck tractor irrespective of weight when operated upon any street or highway in the City shall be equipped with and carry at least two (2) flares or two (2) warning lights or reflectors, which reflectors shall be of a type approved by the California Highway Patrol as warning signals. When any vehicle mentioned herein or any trailer or semi-trailer is disabled upon any street or highway in the City, a warning signal shall be immediately placed at a distance of approximately one hundred feet (100') in advance of and one hundred feet (100') to the rear of such disabled vehicle by the driver. The warning signals mentioned herein shall be displayed continuously during the time such vehicle remains disabled upon such street or highway. (Ord. 977, 6-13-90)