A severe weather warning is in place for Cornwall, with forecasters predicting high risks of both ice and snow from Thursday night.
The south coast is expected to suffer a substantial drop in temperatures, from 8C to 0C overnight, and snow up to 2in (5cm) deep is possible in some areas.
Cornwall Council said its staff were on standby to deal with any problems.
It said officers from its emergency management service were monitoring the situation closely.
The service would be liaising closely with staff from other council services and partner agencies to respond if the situation deteriorated, the council said.
It added that the main highways depots would will be staffed from Thursday evening to co-ordinate any action required overnight into Friday morning.
It said that Wednesday had been the 21st consecutive day that highways staff had been out treating roads.