Regarding the likely lack of pit boxes in Toronto, I suppose one possibility could be another smaller pit area, though I'm not sure it would be the most practical solution. There is always an escape road left for cars reaching Turn 1 where they can go through the Princes' Gates to Strachan Avenue and rejoin at Turn 2. The cars using it during it the race would have to be stopped for more time to make sure they wouldn't gain an advantage because of using this shorter pit lane, along with only being allowed to rejoin when no other cars were approaching.
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