M4 Toll Newport Bypass

Scheme outline

Construction of a new dual-three lane motorway standard bypass to the south of the city of Newport. The route has been planned for many years to relieve the existing M4 bypass, which runs through tunnels to the north of the city and cannot be widened. The plan has now finally been confirmed, as a privately financed toll road on the model of the M6 Toll.

It seems likely the new road will tie in to the existing M4 at or near to the existing junctions with the M48 and A48(M), in which case it seems likely that the existing Newport Bypass and A48(M) will be renumbered as M48.

This scheme has been replaced by the M4 Newport Relief Road.

This scheme has been cancelled. We're no longer accepting updates or changes to this page.

New road
under motorway restrictions
Highway authority
PFI/Welsh Assembly


14 November 2007

New information has been published on the Welsh Assembly's website, including their proposed timetable of construction, due to start in 2010. There is still debate over whether this road will be free or tolled.

15 July 2009

The BBC website reports that the Welsh Assembly has dropped this scheme, as costs rise to an estimated £1bn.

More information