greatnan Snow in Britain causes problems just because most of the country is not as high as Snowdon, or as landlocked as Switzerland. We don't get the definite weather change which gives a fall of deep but fine snow, and then keeps it as snow that can be shovelled away.
The temperature in this island surrounded by seas fluctuates up and down, and the wind changes, so that we get shortish falls of snow, followed by milder spells, several times a day, repeatedly.
The snow is not fine and powdery, it is soggy and melts as it lands, then when the temperature drops a bit it freezes into ice and another layer lands on top of it. It is the ice that makes for dangerous driving conditions.
To keep all the roads safe, whole battalions of snow-ploughs would need to patrol continually 24 hours a day, getting the inch or two of snow off every road the moment it fell, and before the first layer became half-melted and froze.