Route
Junction number
6
Markerpost
23.5 km
Name
Theydon Interchange
Type
Terminus
Not a terminus
Other routes
M25
Authority
Restricted turns
Full access
Services
No services
M11 J6 Theydon Interchange
Layout and signage
(M4 
Lane configuration
- Lane 1 exits and returns after the junction.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 1 exits and returns after the junction.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
What's new
Where did the M25 come from?
London’s notorious orbital motorway turns 40 years old today. Where did it come from - and why the number “25”?
The long way round
When a road is closed, why isn't the diversion route just the quickest way past the closure?
Signs and sensibility
The one great attempt to make London’s streets logical - and how one retired chauffeur’s favourite routes changed the way you get around the capital.
Have you seen...
From War to Worboys
The tale of how British traffic signing developed between the Second World War and the mid-1960s, bringing us from a system designed at the turn of the century to the signs we still use today.
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