M4 Toll Newport Bypass

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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.

Project Statistics

PFI/Welsh Assembly
Estimated duration of works
Length of new road
8 miles


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.

More information


If you know more

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With thanks to Gerry McKenna for information on this page.