A1(M) J1 South Mimms Interchange

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Route
#
Junction number
1
Markerpost
23
Name
South Mimms Interchange
Terminus
Not a terminus
Other routes
M25
Authority
Highways England
Restricted turns
Full access
Services
Service area here
Service area name
South Mimms
Services owner
Welcome Break

Layout and signage

Stansted Airport (M11 Link)
Dartford Tunnel (M20 Link)
Heathrow Airport (M4 Link)
M25 Link
Barnet A1081
Services South Mimms
  M25
(M4)
   

M25
(M11)
(M20)

A1081
  Stansted Airport (M11 Link)
Dartford Tunnel (M20 Link)
Heathrow Airport (M4 Link)
M25 Link
Barnet A1081
Services South Mimms

Lane configuration

LanesLanesLanesLanesLanes

  • Lane 1 exits and does not return.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.

LanesLanesLanesLanesLanes

  • Lane 1 is gained from the entry sliproad.
  • Lane 2 continues, with option to exit.
  • Lane 3 continues ahead.

Other events

  • Signs Start of motorway regulations
  • Signs End of motorway regulations