Motorists in Hampshire and Kent should only travel if "absolutely essential", police have warned as the freezing conditions continue to grip the UK.
Driving conditions in Kent are said to be "hazardous" with "very poor visibility", local police said.
The M25, M26 and M2 are passable with care but diversions are in place at junction 11 of the M20 as part of a plan to reduce congestion, with traffic being directed on to the A20.
Only Eurotunnel freight traffic is being queued between junctions 11 and 12. All other freight will be diverted as other traffic.
Meanwhile although there was no snow overnight, the ice is taking hold in Hampshire making roads dangerous, they said.
Chief Inspector Andy Reeves said: "As we go into a new day our message has to remain the same - driving conditions across the county are still extremely dangerous and you should only make journeys which are absolutely essential.
"Kent Police are working with partner agencies to keep traffic on the road network moving. Continuing snow and freezing conditions are making this difficult.
"Motorists should be prepared, please consider your safety and decide if your journey is really necessary.
"If you do travel, make sure you have the right provisions for emergencies. If you are already at work, you should give serious consideration to getting home before conditions worsen.
"We urge everyone to continue listening to local broadcasts and check news websites before setting out on their journey.
"If you have elderly or vulnerable neighbours or relatives, please remember to check on them to ensure they are safe and well.
"Pedestrians are reminded to take great care, as icy conditions continue to make footpaths dangerous."
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