Route
Junction number
45
Markerpost
304.3 km
Name
Ynysforgan Interchange
Terminus
Not a terminus
Other routes
A4067, B4603
Authority
Restricted turns
Full access
Services
No services
M4 J45 Ynysforgan Interchange
Layout and signage
|
Abertawe (G) Swansea (N) Pontardawe A4067 |
A4067 B4603 |
|
A4067 B4603 |
Abertawe (G) Swansea (N) Pontardawe A4067 |
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
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...
Smart Motorways
Motorways used to be really simple. Now they have electronic signals, variable speed limits, emergency lay-bys, part-time hard shoulders... Just what is so smart about Smart Motorways?
About this page
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