Upon the immediate approach of a funeral procession, the driver of every other vehicle, except an authorized emergency vehicle, shall yield the right-of-way. An operator of a motor vehicle which is part of a funeral procession shall not be charged with violating traffic rules and regulations relating to traffic signals and devices while participating in the procession unless the operation is reckless.
(Iowa Code § 321.324A) (1999 Code, § 62.05) Penalty, see § 72.99