Toronto has one of the largest buildings in the world by footprint, the "PATH". It's an underground labrynth of shops and food courts, almost a mall, that stretches a huge chunk of the city, several miles at least. I looked it up, it's 85 acres large. One building. All underground. in the form of a thin spiderweb, so those acres aren't a nice square to take space, they're hallways upon hallways. People don't like admitting the PATH is a singular building for some reason, but you can walk for 30 minutes in one direction in it, and never see the light of day, only artificial glow. Which to me says its one fuckin' building.

It also links to, like, 6 subways stations, three surface-transit hubs, several grocery stores, and three other ACTUAL malls. It's that large. Wild take, but Toronto sidewalks don't actually need to be cleared all that much. Just... walk on the PATH. I know, it's hard to tell where you're going because it's all endless rows of shops, but it links directly, no outside exposure, has stairwells and elevators, to a whole massive chunk of the skyscrapers in the city, too.

In summary... They don't need to clear the snow! Toronto can petty much just go underground whenever it gets chilly. Walking too slow for you? Take one of those six subway stations!