That's a problem being solved already in Scandinavian countries. It just takes education and continually improving infrastructure. The more bikers that are on the road, the safer everyone feels riding a bike, which means more bikers on the road :)
The only thing that article says about snow is to prioritize clearing it on bike routes. That isn't good enough by a long shot. Sorry I'm not riding a bike when it's below freezing and I'm not riding a bike in the snow or the rain. Just forget it.
While the amount of bike traffic definitely goes down during winter, I can't recall a day in Chicago this last year where I didn't see anyone in the bike lanes