Icy road conditions also made for hazardous travel in North Carolina, Kentucky, Indiana and Tennessee on Friday.
People across East Yorkshire and northern Lincolnshire are being warned to take care while travelling because of icy road conditions.
She had been heading from Kent to Brighton to help her daughters after they were involved in a minor road accident on an icy road.
However, First Cymru Buses said all services in Swansea, the Swansea Valley, Neath and Port Talbot would stop running by 19:00 GMT on Friday because of the icy road conditions.
In Virginia, three people were killed, including a 22-year-old man who died Thursday after his vehicle ran off an icy road, went over an embankment and landed upside down in a creek.
Bus operator Stagecoach said road conditions were icy and untreated.
The wintry blast also caused problems for motorists in southeast England, with some trapped in their vehicles overnight by accidents and road closures on icy highways in Kent and Sussex.
Freezing temperatures and icy roads have created "nightmare" road conditions in 2010 and rail services have been severely disrupted.
Firefighters cut free the driver from Attleborough trapped for over an hour in icy temperatures when his car came off the road at Deopham on Saturday.
And a 30-year-old man was seriously injured in an accident on an icy M18 near Doncaster, when his car collided with a road sign and overturned.
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The town of maybe a few hundred people is locked in a self-sustaining cycle of grief after a school bus slides off the road one morning, careens down a slope, and sinks in an icy lake.
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There, smaller roads have become extremely icy in patches and some have been blocked by jack-knifed lorries or double-deckers stuck in the road.
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