Iowa Code Title VIII. Transportation [Chs. 306-330B] § 321.475. Liability for damage--rules

1. a. Any person driving any vehicle, object, or contrivance upon any highway or highway structure shall be liable for all damage which said highway or structure may sustain as a result of any illegal operation, driving, or moving of such vehicle, object, or contrivance, or as a result of operation, driving, or moving any vehicle, object, or contrivance weighing in excess of the maximum weight in this chapter but authorized by a special permit issued as provided in this chapter.

b. Whenever such driver is not the owner of such vehicle, object, or contrivance, but is so operating, driving, or moving the same with the express or implied permission of said owner, then said owner and driver shall be jointly and severally liable for any such damage. Such damage may be recovered in a civil action brought by the authorities in control of such highway or highway structure.