M20 motorway

M20 shield
M20
Map
M20 highlighted in blue
Route information
Part of E15
Maintained by National Highways
Length50.6 mi (81.4 km)
Existed1971–present
HistoryOpened: 1960 (as A20(M))
Renumbered: 1971
Completed: 1991
Major junctions
West endSwanley
Major intersections
J1 → M25 motorway

J3 → M26 motorway
East endFolkestone
Location
CountryUnited Kingdom
CountiesKent
Primary
destinations
London
Maidstone
Ashford
Channel Tunnel
Folkestone
Road network
M18 M23
Looking east near Aylesford

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.