Route
Junction number
M4 J8/9
Markerpost
45.2 km
Name
Holyport Interchange
Terminus
Terminus at end of exit list
Other routes
M4, A408(M)
Authority
Restricted turns
Full access
Services
No services
A308(M) (M4 J8/9) Holyport Interchange
Traffic signalsWhat'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...
The Magic Roundabout
Officially the seventh most frightening thing on the road network - but actually it might just be the most efficient junction ever designed.
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