In reply to Bottom Clinger:
Would it be possible for you to drive? I was working at a center in Perth and Kinross yesterday and the group who were leaving were returning to Peterhead and Aberdeen areas. Their bus drivers did get down and were predicting around 5 hours to get home. There were enough roads open to make it feasible, but it wasn't the main roads.
I suspect for something important like caring duties, you could get through somehow, with care. Obviously, they don't want lots of people on the roads, but some people really don't have much choice.