Route
Junction number
23A
Markerpost
208.4 km
Name
Magor Interchange
Terminus
Not a terminus
Other routes
A4810
Authority
Restricted turns
Full access
Services
Service area here
Service area name
Magor
Services operator
First
M4 J23A Magor Interchange
Layout and signage
|
Caldicot Magwyr — Magor A4810  Magor
|
|
A4810 |
Magwyr — Magor Caldicot A4810 Magor
|
Lane configuration
- Lane 1 exits and returns after the junction.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 1 exits and returns after the junction.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
What's new
The sunlit uplands
On Saturday 31 May something historic happened. The Heads of the Valleys Road was finally complete.
Grand openings
Our much-loved Opening Booklets section has two new publications for you to explore, and we’re making some overdue changes to make them easier to find and easier to read.
Silver bullet
The Silvertown Tunnel is finally open for business. One question remains: what’s it for?
Have you seen...
M1 under construction
Pictures taken as the first section of the M1 was being built in 1958-9, with all its unique architecture still under construction.
About this page
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