For the purpose of this article, the following words and phrases shall have the meanings respectively ascribed to them:
A vehicle, or more than one vehicle (when each vehicle is following the other as in a procession) being led by a police officer of the city or a patrolman of the state department of public safety, or the county sheriff or one of his deputies.
Any procession whereby a funeral is in progress and the city police are leading the procession.
Any procession whereby a parade is in progress.
The leading of vehicles or a vehicle through or on a street or highway in the city by a police officer driving a vehicle plainly marked in such a way as to indicate that the same is operated by a peace officer of the city or the county or of the department of public safety of the state.
(2000 Code, sec. 24-311)