Route
Junction number
8A
Markerpost
33.7 km
Name
Carreg Bran Interchange
Type
Terminus
Not a terminus
Other routes
A5
Authority
Restricted turns
Some turns restricted
Services
No services
A55 J8A Carreg Bran Interchange
Layout and signage
|
Llanfair Pwllgwyngyll Porthaethwy Menai Bridge A5 Beaumaris (A545) |
A5 | 
|
A5 |
Lane configuration
- Lane 1 has option to exit and splits to create a new lane.
- Lane 1 continues ahead.
- Lane 2 terminates.
Other events
National Speed Limit begins
50mph speed limit begins
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...
Clear and legible
A century ago, one short memorandum issued by the Ministry of Transport laid the groundwork for a system of standardised, uniform road signs and a great deal more.
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Published
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