But it seldom snows in Seattle, so they don't bother to invest in any snow-clearing infrastructure - the city just shuts down for a day or two after a mild snow

But it seldom snows in Seattle, so they don't bother to invest in any snow-clearing infrastructure - the city just shuts down for a day or two after a mild snowstorm. San Francisco is known for its hills, but Seattle has some pretty bike-unfriendly hills as well, unless you've got an electric motor attached to your bike.