Back M48 Welsh M48 motorway German آزادراه ام۴۸ Persian Autoroute M48 (Grande-Bretagne) French Autostrada M48 (Gran Bretagna) LMO M48 (Groot-Brittannië) Dutch Autostrada M48 Polish M48 motorway SIMPLE M48 Swedish
 | ||||
|---|---|---|---|---|
 M48 highlighted in blue | ||||
_full_view_-_geograph.org.uk_-_1742850.jpg) The Severn Bridge (M48) | ||||
| Route information | ||||
| Maintained by National Highways (England) and the South Wales Trunk Road Agent | ||||
| Length | 13 mi (21 km) | |||
| Existed | 1966–present | |||
| Major junctions | ||||
| East end | Awkley | |||
  J21 → M4 motorway  J23 → M4 motorway | ||||
| West end | Undy | |||
| Location | ||||
| Country | United Kingdom | |||
| Primary destinations | Chepstow | |||
| Road network | ||||
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The M48 is a 13-mile (21 km) long motorway in Great Britain, which crosses the Severn near Chepstow, Monmouthshire, linking England with Wales via the Severn Bridge. This road used to be the M4, and as a result is anomalously numbered: as it lies to the north of the M4 and to the west of the M5, it is in the Motorway Zone 5.[1][2] The M4, M48 and the A48(M) motorway are the only motorways in Wales.[3]
- ^ "Motorway Database – M48". CBRD. Retrieved 26 October 2007.
- ^ Steven Jukes. "Pathetic Motorways". Pathetic.org.uk. Retrieved 28 November 2012.
- ^ "Roads in Wales". Traffig Cymru/Traffic Wales. Retrieved 10 September 2023.