Route
Junction number
46
Markerpost
307.4 km
Name
Llangyfelach Interchange
Type
Non-standard interchange
Terminus
Not a terminus
Other routes
A48, B4489
Authority
Restricted turns
Full access
Services
No services
M4 J46 Llangyfelach Interchange
Layout and signage
|
Llangyfelach Felindre B4489 |
|
A48 B4489 A48 |
Llangyfelach Felindre B4489 |
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
A bridge under troubled bridges
A bridge that was ruined by another bridge, and a type of highway planning beyond any of the UK’s worst nightmares.
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.
Have you seen...
M4 Chiswick-Langley
An early triumph of the motorway programme, the M4 between Chiswick and Langley linked Central London to Heathrow - then still known as London Airport - and was the start of a new motorway west.
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