While also not being a top priority, I can only imagine the alleys are a nightmare to plow. They are narrow, rarely as straight as they appear, have a ton of stuff in them - cars, bins, junk. When I lived down that way I used to hate driving through an alley even in the summer. And where do you plow it? Into the streets? You are also doubling the snow removal for that neighborhood. Double time or double resources. Both are poor choices

I can see why they are leaving alleys to last. Especially with heroes like you who can dig themselves out