Route
Junction number
(M4 J32)
Markerpost
0.6 km
Name
Coryton Interchange
Terminus
Terminus at end of exit list
Other routes
M4, A4054
Authority
Restricted turns
Full access
Services
No services
A470 Coryton Interchange
Layout and signage
| M4 A4054 |
|
A4054 M4 |
Casnewydd — Newport Pen-y-bont — Bridgend M4 Link Caerdydd — Cardiff A470 |
Lane configuration
- Lane 1 continues ahead.
- Lane 2 continues ahead.
- Lane 1 exits and does not return.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
Other events
National Speed Limit begins
Traffic signals
40mph speed limit begins- Traffic signals
What's new
The monster seen from below
What might it have been like to stand in one spot and witness the arrival, and the uncertainty, of plans for an urban motorway in West London?
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.
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?
About this page
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