Highway is 100-110, and slow moving I think is 40km/h under the limit. No slow moving or bikes allowed on the highway in the city.

It’s part of the Can-A-mex corridor, or used to be until the ring road was built.

Also, snow, plenty of reasons to only go 40km/h in some conditions, going under the limit is illegal only when you’re truly limiting traffic, and that’s always a judgment call.