No person shall park a motor truck, semi-trailer, or other motor vehicle with trailer attached in violation of the following regulations. The provisions of this section shall not apply to pickup, light delivery or panel delivery trucks.
(Code of Iowa, Sec. 321.236[1])
1. Residential Districts. Excepting only when actually making pickups or deliveries to or conducting lawful business at any resident or building within the districts, governed by this section, no person shall park such vehicle (including specifically any motor truck having a freight capacity greater than one ton) on any portion of a street abutting or adjacent to property zoned for R-1, R-1A, R-2 or R-3 occupancy as defined in this Code of Ordinances.
2. Business District. Excepting only when such vehicles are actually engaged in the delivery or receiving of merchandise or cargo, no person shall park or leave unattended such vehicle on any streets within the Business District. When actually receiving or delivering merchandise or cargo such vehicle shall be stopped or parked in a manner which will not interfere with other traffic.
3. Livestock. No such vehicle containing livestock shall be parked on any street, alley, or highway for a period of time of more than thirty (30) minutes.