Details of motorway and local road closures and public transport disruption are available at
BBC Travel News
For advice on handling difficult driving conditions, see the
For information about severe weather warnings, see the
For information about staying healthy in the current cold snap, see the
NHS Winter Health
AA spokesman Paul Watters told the BBC councils had reduced stocks by 250,000 tonnes during the past 10 years.
But the LGA stressed motorists were still be able to travel on major roads.
The prime minister said: "We are making sure stocks of salt to grit roads and pavements get to where they're most needed."
The prime minister also acknowledged businesses were suffering but added the government was "working closely" with the emergency services, and other relevant agencies to keep Britons "safe and warm".
The Highways Agency stopped treating motorway hard shoulders in England. Salt ordered from abroad is not due to arrive until 21 January.
But the agency's David Grunwell said the motorway and trunk road network was "running remarkably well" and that it had sufficient stocks for the conditions.
However, Conservatives say the decision to ration salt was "an admission of utter failure" and plans should have been made earlier.
Chemical firm Ineos said it had diverted 12,000 tonnes of white salt for use on Britain's roads after it was approached by several councils. The salt had been earmarked for food and chlorine production in Germany.
The amount represents about one fifth of the UK's daily use, before rationing was introduced.
The snow continued to fall, with parts of eastern England seeing between 2cm and 5cm (0.8in-2in) of snow on Saturday.
BBC weather forecaster Alex Deakin said up to 10cm (4in) could fall in the South East on Saturday night, in particular south and east of London.
Snow showers will move across England and Wales on Sunday, with falls of 2cm-5cm or 10cm on high ground, he added. Temperatures on Sunday should be around freezing.
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