Route
Junction number
None
Markerpost
129.9 km
Name
Blythe Bridge Interchange
Terminus
Not a terminus
Other routes
A521
Authority
Restricted turns
Full access
Services
No services
A50 Blythe Bridge Interchange
Layout and signage
|
Blythe Bridge A521 |
A521 | 
|
Blythe Bridge A521 |
Lane configuration
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
Other events
National Speed Limit begins
50mph speed limit begins
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...
EuroRoute
Today you can catch a train to France. You can even put your car on it, and be there in less than an hour. But in the 1980s, Euro Tunnel had competition - including plans to build a motorway across the English Channel.
About this page
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Last updated
Published
Last updated
