Route
Junction number
M4 J24
Markerpost
0.0 km
Name
Coldra Interchange
Terminus
Terminus at end of exit list
Other routes
M4, A48, B4237
Authority
Restricted turns
Full access
Services
No services
A449 (M4 J24) Coldra Interchange
Layout and signage
Lane configuration
- Lane 1 continues ahead.
- Lane 2 continues ahead.
- Lane 1 continues, with option to exit.
- Lane 2 exits and does not return.
Other events
National Speed Limit begins
40mph speed limit begins
Traffic signals
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...
New Medway Viaducts
Taken over the course of two years, from 2002 to 2003, these sixteen images chart the construction of two new bridges alongside the M2 Medway Viaduct.
About this page
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