Nice idea, but I am generally against requiring tyre chains.
They replace skill with technology (or devices,) and you get more accidents that are caused by people who just don't know what the Hell they're doing out there, and shouldn't be out in the snow anyhow.
If you have 4WD and good tyres, you can usually FIND a place to go play in the snow without too much trouble - when I feel like I need practise, I check the weather up around Highway 35 out here - when it snows up there, I'll go. It's usually good practise, and there's not a lot of traffic in case you screw up (I took my two boys up there to train them.)
Of course, I'll usually still end up pulling someone out of a jam up there anyhow - that's why I carry TOW chains, not TYRE chains. If the weather gets bad enough to where I feel I need tyre chains for some reason, I'll usually stop anyhow. I honestly wish others would do the same out here - I've had enough "near misses" due to weather that I get the twitching awfuls when it rains...
Besides, what good are tyre chains if you don't use them right?
5-90