Route
Junction number
18
Markerpost
125.6 km
Name
Sandon Interchange
Type
Terminus
Not a terminus
Other routes
A414, A1060
Authority
Restricted turns
Full access
Services
No services
A12 J18 Sandon Interchange
Layout and signage
|
Danbury Maldon A414 |
A1060 | 
|
A414 |
Great Baddow A414 Chelmsford A1060 |
Lane configuration
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
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...
Mixed Signals
During the 1960s the UK developed some of the most sophisticated - and strange - electronic variable message signs anywhere in the world. How? And, just as importantly... why?
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