Take the old road
As a tourist, I have a great deal of interest in “the old highway”. Denotes something that was replaced with newer and better. We have #2 which goes from tip to tip, sort of. The road where you would send a friend with a bicycle.
I used that strategy elsewhere, with mixed results. In QC, the east to west strategy worked well, back in the day, until you hit the outskirts of the metropolis and found that an autoroute means just that; autos only. Or so the police officer told me, before deciding that I was crazy and invisible. Yes, I did rush hour in the slow lane.
In ON, there is also a #2, running east to west along the lakes. The freeways made the route somewhat obsolete, although parts of the route go through some smaller towns. Is Toronto a smaller town, any more? If you knew where to turn, you could also get on to #11, which was quaintly known as the longest main street in Canada. Not much of that remain, if you imagine crossing the world by bike. Cars, only, for many long stretches.
I am now wondering about the US and their famous Route 66. From Chicago to the Santa Monica Pier. The TV series from the days of black and white TV made it seem romantic. Spoiler; the show was not actually filmed in the area. Romantic fiction. However, it (the road) is still very popular with tourists, and I wonder if this might be a fantasy-planned vacation. More videos to watch, just in case.