What is the latest status of the project “M4 Relief Road”?

The status recorded for “M4 Relief Road” is Cancelled.

Who are the main government, EPC, and private stakeholders for “M4 Relief Road”?

Taiyo maps the stakeholders of “M4 Relief Road”: government bodies (Welsh Government).

What is the budget and commercial profile for the project “M4 Relief Road”?

Taiyo normalizes the budget of “M4 Relief Road” to USD 1785245000.

Where can I verify the source and access all details for “M4 Relief Road”?

This Taiyo project page references Swansea Bay News along with the original URL (https://swanseabaynews.com/2025/06/16/calls-to-build-the-m4-relief-road-six-years-after-project-cancelled/). Taiyo standardizes official data into a consistent, searchable project profile.

M4 Relief Road

Sector: Government • Location: Newport, Wales, United Kingdom

Source: Swansea Bay News

Project

Cancelled

The M4 relief road was a proposed six-lane motorway designed to bypass the heavily congested Brynglas Tunnels near Newport. The project was scrapped in June 2019 by the Welsh Labour Government due to the high cost of £1.4 billion, ecological concerns regarding the Gwent Levels, and a commitment to reduce transport emissions. Over £150 million had been spent on preparatory work and planning before

Status: Closed
Sector: Government, Road
Location: Newport, Wales, United Kingdom
Updated: 22 Jul 2026
Source: Swansea Bay News

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Project Information

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The project “M4 Relief Road” is an infrastructure initiative in the Government sector, located in Newport, Wales, United Kingdom. Taiyo aggregates data on it from Swansea Bay News.

Participants

Sponsoring Agency

Status

Original status	Cancelled
Taiyo status	Closed
Taiyo last update	2026-07-22

Contact

Not available for this record.

Description

Description	The M4 relief road was a proposed six-lane motorway designed to bypass the heavily congested Brynglas Tunnels near Newport. The project was scrapped in June 2019 by the Welsh Labour Government due to the high cost of £1.4 billion, ecological concerns regarding the Gwent Levels, and a commitment to reduce transport emissions. Over £150 million had been spent on preparatory work and planning before cancellation. There are current calls by the Welsh Conservatives to deliver the M4 relief road to alleviate traffic and boost the economy.
Original sector	Transport
Budget

Location

Country	United Kingdom (UK)
State	Wales
City	Newport

Source

Source	Swansea Bay News
URL

More Details

Record type	Project
Sector	Government, Road
Article published date	2025-06-18

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M4 Relief Road

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