Could there be an exemption for Ontario highways? Or at least just the ones that were formerly Ontario highways.
If you're not familiar with Ontario highways, in 1997, the provincial government decided to cut costs by "downloading" a large portion of the provincial highways. (Downloading in road terms means decommissioning and giving ownership to county or municipalities). Thus, some Ontario highways have large gaps in them, and other routes were entirely killed off or significantly shortened. Thus, our network isn't really "complete".
Some examples:
Highway 2, used to go from Windsor to Quebec, is now a 1 km long stretch in Gananoque.
Highway 5 used to go from East York in Toronto to Paris (a town near Brantford), now is 12 km long.
Highway 7 used to go from Sarnia to Ottawa, is now two sections, and no longer going to Sarnia.
Highway 11 used to follow Yonge Street all the way down to downtown Toronto. Toronto no longer has any provincial highways (not including freeways) running through it.