Welsh Government
M4 J38 Margam Interchange
Route
Name
Margam Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J37 Pyle Interchange
Route
Name
Pyle Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J35 Pen-coed Interchange
Route
Name
Pen-coed Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J34 Miskin Interchange
Route
Name
Miskin Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J32 Coryton Interchange
Route
Name
Coryton Interchange
Highway Authority
Location type
Three Level Stacked Roundabout
M4 J28 Tredegar Park Interchange
Route
Name
Tredegar Park Interchange
Highway Authority
Location type
Non-standard interchange
M4 J26 Malpas Interchange
Route
Name
Malpas Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J27 High Cross Interchange
Route
Name
High Cross Interchange
Highway Authority
Location type
Non-standard interchange
M4 J25 Caerleon Interchange
Route
Name
Caerleon Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J24 Coldra Interchange
Route
Name
Coldra Interchange
Highway Authority
Location type
Roundabout Interchange
M4 J23A Magor Interchange
Route
Name
Magor Interchange
Highway Authority
Location type
Roundabout Interchange
What's new
Silver bullet
The Silvertown Tunnel is finally open for business. One question remains: what’s it for?
Skid Risk, Accident, Fog
For the first time, we can share pictures of the pioneering experiment that lit up the Worcestershire countryside with enormous signs 61 years ago.
All change
In July 2024, a new Government entered office with a very different set of priorities. What does it mean for a faltering roads programme?
Have you seen...
Abbreviations
How do you describe a road? One way is to use these engineering abbreviations, much loved by the UK's community of road enthusiasts.
