The Met Office has issued an alert hazardous ice is expected tonight (Tuesday, March 12).
Weather officials said travel could be disrupted by the icy conditions.
“Wintry showers will affect some southeastern and eastern areas of England overnight, and in combination with a widespread frost and partly melted snow in some areas, icy stretches are likely to become a hazard, primarily for untreated surfaces,” it said in a statement.
“Snowfall will be mostly restricted to a dusting here and there, but a few places could see a couple of centimetres.
“The public should be aware of the potential for disruption, especially to travel.”
West Sussex County Council said gritting lorries would be out at 8pm and 2pm to tackle the ice.
A spokesman said: “Our gritting fleet has been deployed continually over the past 48 hours treating the priority salting network and we will deploy these again for this evening at 8pm and at 2am tomorrow morning to treat for ice.
“You can get updates on the gritting actions by following WSCCGritting on Twitter.”