Route
Junction number
None
Markerpost
Unknown
Name
Brynglas Tunnels
Type
Tunnel
Terminus
Not a terminus
Other routes
None
Authority
Restricted turns
Full access
Services
No services
M4 Brynglas Tunnels
Layout and signage
| Brynglas Tunnels |  |
Brynglas Tunnels |
What's new
A century of motorways
It's 100 years since the opening of the world's first motorway, the Autostrada from Milan to the Lakes.
Schrödinger’s speed limit
In 2022, Manchester City Council say they reduced the speed limit on the Mancunian Way to 30mph. But it’s not clear if they did. It’s not even clear if they can.
Sorry, wrong number
Road numbering is a system with clear rules. What happens when the people responsible for numbering roads don't follow them?
Have you seen...
Aust to Beachley
Today two motorways cross the Severn near Chepstow. But as recently as 1965, the only crossing was a ferry that carried six cars at a time, from Aust to Beachley.
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Published
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