Police say thirty people were forced to abandon their cars and spend the night in a shelter in Somerset when snow rendered a road impassable.
Drivers and passengers became stranded around 1am on the A39 between Bridgwater and Williton in Somerset when a build up of snow and fallen tress blocked their path.
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Some 20% of carriageways in England and Wales have less than five years of life remaining before they become unusable, researchers said.
Icy conditions expected after a freezing night. The far west will enjoy sunny spells while the rest of the region sees increasing cloud.
Icy conditions expected after a freezing night. Early cloud will break up leaving sunny spells, light winds and temperatures at 8 degrees.