(a) No person shall stop, stand or park a vehicle for any purpose or length of time other than a truck being used for the expeditious unloading and delivery or pickup and loading of materials in any place marked as a truck loading zone during hours when the provisions applicable to such zones are in effect. In no case shall the stop for loading and unloading of materials exceed thirty minutes. (Ord. 78-31. Passed 5-15-78.)
(b) Continuous operation or running of the internal combustion engine of a vehicle during a stop for loading and unloading is prohibited except where such operation is necessary for any power take-offs or refrigeration equipment.