Note the side car. "Circus World" is in Baraboo, Wisconsin, but that organization used to conduct "The Great Circus Parade" here in Milwaukee for a lot of years. They'd load up the train in Baraboo, offload the wagons and animals at the station in Beerhaven, and from 1972 until just a few years ago, Ernest Borgnine was the "Grand Clown" who led the parade.
I'm thinking that was taken at the old Shell station at the corner 13th and St. Paul Avenue. Probably after 1978 - Wisconsin repealed it's helmet laws in '78.