Route
Junction number
23
Markerpost
134.0 km
Name
Bignells Corner
Terminus
Not a terminus
Other routes
A1(M), A1, A1081
Authority
Restricted turns
Full access
Services
Service area here
Service area name
South Mimms
Services operator
Welcome Break
M25 J23 Bignells Corner
Layout and signage
South Mimms
Lane configuration
- Lane 1 exits and returns after the junction.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 4 continues ahead.
- Lane 1 exits and returns after the junction.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 4 continues ahead.
Other events
Variable Speed Limits apply
- Variable Speed Limits apply
What's new
The road that made no sense
It was the UK's only single-carriageway motorway, and twenty years ago it ceased to exist. This is the story of the strange fascination it held, and of my place in history.
The forever bottleneck, part 2
The second part of the story, where we learn why exactly the M4 gets narrower on the final approach to Europe’s biggest city.
The forever bottleneck, part 1
The M4 into London was one of the UK's earliest and most ambitious motorway projects. It was bold, pioneering... and almost instantly regretted.
Have you seen...
Emergency Diversion Routes
Those funny black and yellow symbols are everywhere - and they might just get you back on track one day.
About this page
Published
Last updated
Published
Last updated
