The snow and ice has caused major travel disruption
A week of snow followed by freezing temperatures overnight has lead to extremely treacherous icy conditions on Oxfordshire's roads, police warn.
Temperatures plunged to -8C near Benson and minor roads which were covered in snow on Friday are now iced over.
There are also reports of a number of patches of black ice affecting the A44 and Station Road in Brize Norton.
Gritting operations on the roads are being cut back to conserve stocks of road salt through the cold spell.
Oxfordshire County Council says supplies are not exhausted, but they say making cuts now will mean priority routes can be treated during the continuing cold weather.
There are still some delays on public transport and First Great Western are asking people to check before they travel.
The Oxford Bus Company said it is running a good service on most routes in the city and buses to London, Heathrow and Gatwick are running as normal.
But it warned that services running on untreated roads will be limited.
The coldest snap for 20 years shows no sign of letting up, with the freezing weather expected to last all weekend and into next week.
"On Monday into Tuesday, southern Britain is at risk of a further dumping of snow," a BBC Weather Centre spokesman said.
The bad weather has meant some children in Oxfordshire had the whole of last week off school. There were more than 300 closures on Friday alone.
There was also chaos on the roads after a string of accidents on the M40 and A34.
Hospitals cancelled non-emergency operations and appointments and ambulance services had to bring out 4x4s to reach people through the snow.