There has been gridlock at Dover, with the suspension of P&O services reducing capacity and bad weather blamed for long queues. Congestion caused by tourists travelling to Kent for an Easter getaway are also said to be contributing to the jams.
Drivers have been forced to wait for hours to board ferries after measures were triggered to control the movement of HGVs in the area. Under Operation Brock, lorries heading to Dover are allowed to use one side of the M20 while all other traffic is restricted to a contraflow system on the opposite side.
The Department for Transport (Dft) said efforts were being made to minimise disruption. "We are aware of queues at Dover, and the Kent Resilience Forum and local partners are working to minimise any disruption by deploying temporary traffic management measures as standard," it said in a statement.