|Location Map ( geo)|
|Llanfihangel near Rogiet|
The M48 was originally part of the M4, taking the motorway to the Severn Crossing. When the Second Severn Crossing was constructed in 1996, the M4 took a more southerly route, and the former M4 became the M48. This junction marks the western end where the old and new routes meet; the roads meet again at Awkley Interchange.
Since both the M4 and the M48 head for crossings over the Severn, there seemed to be no reason to build a link between the M4 westbound and M48 eastbound (and vice-versa) so this is a simple fork junction.
Newport Southern Bypass Proposals
In the 2010s, the junction was due to be rebuilt as part of the M4 Newport southern bypass. This would have consisted of a roundabout interchange between the M4, the B4245 and a link road to a new at-grade roundabout on the M48 and the existing M4 route north of Newport. However, these proposals were cancelled by the Welsh Government.
|Bryste / Bristol, Llundain / London|
|Casnewydd / Newport, Caerdydd / Cardiff|
|Cas-gwent / Chepstow|
|Cardiff/Caerdydd, Newport (S)/Casnewydd (D)||Unbuilt route south of Newport|