The Met Office has issued a new warning for widespread ice and possible sleet across Dorset on Sunday night as driving conditions remain treacherous this morning.
Temperatures could reach as low as minus 8 Celsius in Dorchester, forecasters say.
Most rail and bus services have returned to normal following disruption because of heavy snow but drivers are being urged to take care and travel only if necessary.
Dorset County Council says its gritters have been out in force, spreading 1,300 tonnes of salt in the last 24 hours.
South West Trains, which was the worst affected rail operator on Saturday, says its services are now back to the regularly scheduled timetable.
A Met Office yellow alert of ice had already been issued for Sunday morning and a new one will be in force from midnight tonight until 12pm tomorrow.
It says: "Sub-zero overnight temperatures will lead to ice forming where snow has fallen or melted during Sunday or where fresh sleet or snow falls early on Monday.
"The public should be aware of the risk of disruption to travel during this spell of wintry weather."