Fresh weather warnings for ice and snow have been issued covering all of Scotland on Tuesday, as hundreds of schools remain closed in the north of the country.
A Met Office alert has been upgraded to amber in parts of the north until 19:00, while in central and southern areas a yellow warning is in place until 11:00.
Disruption on roads and the railway network is expected to continue as transport operators work to clear routes in severe wintry conditions.
Aberdeenshire, Orkney and Shetland councils said schools would remain closed, while Aberdeen said some schools, with staff living nearby, should be able to open.