[germ]

This. Regulating seasonal snow tire/chain usage in areas with lots of snow/ice is imperative to reducing collisions and improving safety. That and decent infrastructure for clearing snow in a fairly timely manner.

All seasons can't and _wont_ cut it in some areas, and having tires that only work 3/4s of the year for traction is dicey at best.

Source: I drive a Miata in winter up in Saskatchewan

[autoliteInline]

'round these parts (which is hilly and has wet snow), the limiting factor (given decent snow tires) doesn't tend to be traction, it's high centering.