Please don't flame me too much, I don't want the snow to melt!
Surely one of the main reason why the roads ground to a halt is that we as the British public aren't properly prepared. And I mean the drivers. How many people have put snow chains on their cars, or winter tyres, when we know it is going to snow? Probably not a lot of us. And how many of us have things like a show shovel in the car, in case we need digging out, or a flask of hot drink, blankets etc?
Aibu in thinking there should be more public awareness about what you should have with you in case of snow, and if people don't follow the advice, and it causes grid lock, they shouldn't then moan about it?