Route
Junction number
None
Markerpost
20.2 km
Name
Glynneath Interchange
Type
Terminus
Not a terminus
Other routes
A4109
Authority
Restricted turns
Full access
Services
No services
A465 Glynneath Interchange
Layout and signage
|
Onllwyn A4109 |
A4109 | 
|
Glyn-nedd — Glynneath Onllwyn A4109 |
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...
Sir James Drake
County Surveyor and Bridgemaster for Lancashire in the 1950s and 60s, Drake was instrumental in the motorway revolution.
About this page
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