M48

M48

Olveston
to
Caldicot

The M48 crosses the River Severn alongside the M4 on the original Severn Bridge, carrying local and commuter traffic and forming a diversion route in the event that the Second Severn Crossing is closed.

Routes

M4 Newport Relief Road 8 March 2017

Construction of a new dual three-lane motorway to the south of Newport, from junction 23 of the existing M4 to junction 29, in order to replace the existing motorway which suffers severe operational and congestion problems.

This solution has been chosen partly because widening the M4 and bringing it up to modern standards would be prohibitively difficult - in particular with regard to the Brynglas Tunnels and the twisting alignment.

Routes
Region

M4 in Wales 31 October 2002

One man's account of the building of the M4 through Wales, seen as he grew up in Swansea and witnessed it stage by stage - a tour of the motorway from its construction to the present day.

Routes

Histories