Managing the traffic on M20

Operation Stack is a way of managing traffic during disruption to Eurotunnel or ferry services in Kent.

Lorry drivers waiting to use these services are told to prepare to queue on the M20, while all other traffic is diverted onto other routes.

It is used between junction 8 for the Maidstone services and junction 9 in Ashford.

If more space is needed, the closed section extends to junction 11 at Westenhanger.

Freight is separated into two queues on the coastbound carriageway, with one for tunnel traffic and for port traffic.

Middle lanes must be kept clear for emergency vehicles.

Lorries are released in stages at the request of the Port of Dover and Channel Tunnel, gradually clearing congestion on the motorway.

All tourists and nonfreight traffic must use the alternative signposted routes and are advised to leave in plenty of time.

Those heading to the tunnel use the M20 and A20 and follow the hollow circle diversion symbol.

If you’re heading to the port, use the A2, M2, A2. If you’re already on the M20 when Op Stack is put in place you’ll be diverted off at junction 7 towards Dover.

Recovery vehicles are usually put on standby to clear the route in case of breakdowns.

It is also police advice to ensure sure you have bottles of water and food with you in case of delays.