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The Dartford Bridge has been closed due to strong winds and dangerous driving conditions.
Traffic heading clockwise around the M25 is queuing for three miles from J31 in Essex to J1A A206 Bob Dunn Way at Dartford.
All traffic is being diverted through the right hand tunnel.
Drivers heading anticlockwise should expect long delays and queues for four miles with congestion starting beyond J2.
The left hand tunnel heading anticlockwise is also shut due to strong winds.
Delays are expected to take 35 minutes.
Meanwhile, rail disruption is expected to last throughout the next day with Storm Franklin set to batter the UK tonight.
A 50mph speed restriction is in place across the network in Kent, said Network Rail.
A spokesman added: "Disruption is likely to be so widespread it will not be possible to put rail replacement buses on, and for that reason some operators are advising against travelling at all through Monday.
"At the very least check before you travel and if you don't have to, stay home and safe."
Two lanes have been closed due to a fallen tree on the M20 Londonbound carriageway between J11 for Hythe and J10 for Ashford South.
Traffic is said to be coping well but the first and second lanes are shut around the incident.
Collapsed scaffolding on a building along the A227 in Meopham on Friday afternoon is still blocking the road as the continued bad weather over the weekend has prevented it being removed.