|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.
This junction is due to be rebuilt as part of the M4 Newport southern bypass. It will consist of a roundabout interchange between the M4, the B4245 and a link road to a new at-grade roundabout on the M48 and the downgraded M4 route north of Newport.
|Chepstow/Cas-gwent & Services/Gwasenaethau|
|Cardiff/Caerdydd, Newport (S)/Casnewydd (D)||Unbuilt route south of Newport|
|Magor / Magwyr, Undy / Gwndy|
|Caldicot / Cil-y-Coed, Rogiet, Llanfihangel near Rogiet|