ICY roads led to two single vehicle crashes in the space of an hour at Rye last Friday.
Emergency services attended crashes at Udimore Road and Peasmarch Road.
Police warned drivers they may be travelling through ice even if they did not have to clear it from their cars.
A Sussex Police spokeswoman said: “We would urge drivers to take extra care on the roads during this cold period as the roads appear to be icy in some places.
“Even if you do not need to clear ice from your car in the morning please be aware that where you are travelling to may be icy.”