If you've ever lived where winter snows are something more than a short term event, where you've had to put snow chains on your tires to have enough traction to drive around on snow or ice-covered roads, you'll appreciate Czech inventor Petr Gross' invention that can provide that kind of function without anywhere near the same level of effort to install and use. Via Core77, here's Reuters' video report on the hubcap attachments that can replace snow chains.
Now, if you've never lived where winter storms are something more than a short term event, the following video from the British Columbia Ministry of Transportation on how to safely install snow chains on your car's tires demonstrates just how much labor Petr Gross' invention can save:
Now, just imagine trying to do all that at sub-freezing temperatures with a bitingly cold wind chill, and you'll have a real appreciation for why Petr Gross' modern makeover of the snow chain concept may be a big deal!