Motorists trying to leave the county are queuing for around eight miles due to a broken-down van.
There are severe delays on the A282 northbound between junction 1A, for Dartford, and junction 31 on the M25 this afternoon (June 25).
All lanes have been reopened after the west tunnel was closed earlier for about two hours due to the broken-down light goods vehicle.
Queues are back to junction 4 on the M25 for Orpington with 90-minute delays above normal travel times.
National Highways traffic officers and recovery are on the scene.
Listen to kmfm for regular travel updates.
Drivers are being advised to plan their journeys, allow extra time and consider alternative routes if possible.
