In Guelph, a large car painted purple with a grille I did not recognize. I did get a good look at the tail fins and used Google to look them up. Very distinctive big fins.
Google said a 1958 thru 1960 Impala. THe fins were nearer the 1960 below than the the 1958 pic.
The glimpse of the nose of the car, the grille looked nothing like those images so I don't know.
Driven by an old coot with a bushy white mustache if that helps