Snow and ice are causing further disruption to road, rail and air travel in parts of the UK.
A Met Office amber warning of a possible risk to life because of snow is in place in south-west England until the early hours of Monday morning.
Video from Okehampton in Devon shows dozens of vehicles stranded on the A30. Many other motorists have taken refuge in the car park of a service station.
Scores of schools in the county will be closed on Monday due to heavy snow.
BBC correspondent Sarah Ransome says despite having gritters out relentlessly, the county is still covered in “a very heavy dump of snow”.
At least one hospital in Devon has been asking for volunteer drivers to help ferry staff to and from its facilities.
Airports have been shut and several sporting events have been cancelled, including the Reading half-marathon, while some roads are impassable.
All Flybe services at Exeter Airport were cancelled and on Monday passengers are warned to expect disruption until mid-morning.
Snow and ice have also led to road closures and vehicles being abandoned, with police warning motorists to avoid certain routes.
Two multi-vehicle crashes have caused long delays on the A30 around Okehampton and Whiddon Down in Devon.
A police officer tweeted from the A30, urging motorists to be cautious:
Bristol Airport was closed temporarily due to the snowfall while Heathrow, Gatwick, Stansted and Luton remain mainly unaffected but have urged passengers to check flight information before travelling.