Motorists on the A90, M90 and A9 were stranded overnight on Monday due to blizzard conditions.
More than 600 people were offered emergency accommodation at a sports hall in Perth, Scotland after being caught in heavy snow.
The A9 was closed between Dunblane and Perth on Monday night, and drivers were urged by Central Scotland Police to avoid the roads throughout the remaining force area unless absolutely necessary.
A spokesman said: "Conditions are horrendous and we would urge caution."
Weather forecasters have warned that the icy conditions will continue, with more snow predicted to fall in the North East and parts of eastern Scotland over the next days.
As Yorkshire sees more snow, driving has been determined to be dangerous in many areas.
Police in East Yorkshire have advised motorists to take extra care and drive according to the weather conditions as overnight snow left a number of roads across the region difficult to negotiate.
The coldest overnight in the UK was Altnaharra in northern Scotland, which recorded a low of minus 16.1C (3F).
© Press Association 2010