Rogiet Interchange
| Rogiet Interchange | |||
| Location Map ( geo) | |||
 | |||
| |||
| Location | |||
| Llanfihangel near Rogiet | |||
| County | |||
| Monmouthshire | |||
| Highway Authority | |||
| Welsh Government | |||
| Junction Type | |||
| Fork | |||
| Roads Joined | |||
| M4, M48 | |||
For the original junction 23 of the M4, see Magor Interchange.
Rogiet Interchange is junction 23 of the M4, the western of two fork junctions between that motorway and the M48.
History
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.
Routes
| Route | To | Notes |
| Bryste / Bristol, Llundain / London | ||
| Casnewydd / Newport, Caerdydd / Cardiff | ||
| Cas-gwent / Chepstow | ||
| Cardiff/Caerdydd, Newport (S)/Casnewydd (D) | Unbuilt route south of Newport |
