Route
Junction number
1
Markerpost
23 km
Name
South Mimms Interchange
Terminus
Not a terminus
Other routes
M25, A1081
Authority
Restricted turns
Full access
Services
Service area here
Service area name
South Mimms
Services operator
Welcome Break
A1(M) J1 South Mimms Interchange
Layout and signage
(M11 
South Mimms
Lane configuration
- Lane 1 exits and does not return.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 1 is gained from the entry sliproad.
- Lane 2 continues, with option to exit.
- Lane 3 continues ahead.
Other events
Start of motorway regulations
End of motorway regulations
What's new
London, in a new light
It was specially designed never to be noticed. And now it's disappearing, nobody has noticed its absence. It's London's own bespoke street light.
The Ringways Map is here
The wait is over! The full map of the Ringways, London’s unbuilt urban motorway network, is now online. Not even the system's planners had anything like this.
Red, white and blue
Kent County Council is run by eurosceptic nationalists. So why are they putting EU flags on their road signs?
Have you seen...
M25 Orbital Motorway
The M25 is either one of the greatest transport achievements of the 20th century or one of Britain's largest planning failures, depending on which way you look at it. This booklet takes the former view, celebrating the completion of the circuit in 1986.
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