M20 motorway

M20
M20 highlighted in blue
Route information
Part of E15
Maintained by National Highways
Length	50.6 mi (81.4 km)
Existed	1971–present
History	Opened: 1960 (as A20(M)) Renumbered: 1971 Completed: 1991
Major junctions
West end	Swanley
Major intersections	J1 → M25 motorway J3 → M26 motorway
East end	Folkestone
Location
Country	United Kingdom
Counties	Kent
Primary destinations	London Maidstone Ashford Channel Tunnel Folkestone
Road network
Roads in the United Kingdom Motorways A and B road zones
← M18 → M23

The M20 is a motorway in Kent, England. It follows on from the A20 at Swanley, meeting the M25, and continuing on to Folkestone, providing a link to the Channel Tunnel and the ports at Dover. It is 50.6 miles (81.4 km) long. Although not signposted in England, this road is part of the European route E15. It is also used as a holding area for goods traffic when traffic across the English Channel is disrupted, such as Operation Stack and Operation Brock.