Ice will pose the greatest danger to drivers in Somerset over the next 24 hours.
Up to six inches of snow fell over the county yesterday, but forecasters are now warning residents to prepare for the big freeze.
The Met Office has issued a severe weather warning for ice, with a yellow alert in place across Somerset until 11am on Sunday morning.
A light covering of snow fell overnight and the Met Office said some further slight snowfalls of 1cm to 2cm are expected in places today, but the forecaster said its primary concern now was for ice.
Met Office chief forecaster Frank Saunders said: "Although some further slight snowfalls are likely, the focus switches to ice, with sub-zero temperatures persisting over existing snow cover for many areas and spreading back into parts of the South West towards daybreak on Saturday.
"The public should be aware of the risk of localised disruption to transport during this spell of wintry weather."
The freezing temperatures will mean thatsnow lying on the ground will not melt, and will cause some very icy conditions.
The ice threat is expected to be particularly bad on the roads when partially melted snow or slush freezes.
Click here to see the latest weather forecast in Somerset.
Click here to visit the Met Office website.