Kent (England): As border checks began before Brexit, trucks were stranded for miles on the motorway.
Vehicles from the UK also had to wait for hours on the Kent motorway as Brexit border control checks were being carried out in the channel tunnel.
Meanwhile, Highways England said it had closed entry and exit via slip roads to Junction 11 due to the passing of hundreds of large lorries.
The long queue and delay on the motorway was reportedly caused by French officials conducting a border check at the Eurotunnel terminal in Folkstone.
The Channel Tunnel connects Folkestone to Coquelles near Calais in France.
A spokesman for Getlink, which operates the Channel Tunnel, said the inspection by authorities on Tuesday morning ahead of Brexit had adversely affected cargo movement.
He said traffic through the terminal was now smooth and services were running as usual.
However, with the Brexit process set to begin on December 31, border inspections will be more widespread. This will increase road congestion.
At the same time, pictures of hundreds of lorries parked on the M20 have been released as part of the border check.
The area experienced heavy congestion as part of the inspection. Most vehicles had to wait for hours to cross the border.
Highways England tweeted that the entry slip has now been closed due to heavy congestion in the area due to delays in the J20 Westbound M20 cost bound-Euro tunnel. The tweet also said that due to heavy traffic in the area, they closed the exit slip at J11 Westhanger for security reasons.