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Welsh government announces M4 junction closures and plans for a new Menai crossing
Overview
The Welsh government has unveiled transport proposals to tackle severe congestion bottlenecks in north and south Wales. The plans include an 18-month study looking at road-based solutions for the M4 around Newport, potential short-term closures of M4 junctions 25, 26, and 27, and the recommencement of development work for a third crossing over the Menai Strait. While local leaders and opposition politicians have criticised the potential junction closures for risking increased traffic on local roads, the government has also committed to accelerating the delivery of new rail stations in Cardiff Parkway, Magor, and Undy.
Key points
- The Welsh government is considering closing M4 junction 27 and east-facing slip roads at junctions 25 and 26 in Newport by 2028 to improve traffic flow.
- An 18-month study will examine road-based solutions for the M4 around Newport, though a black route for an M4 relief road remains ruled out.
- Development work will recommence for a third Menai crossing, estimated to cost up to £700m and take up to 10 years to build.
- A review by transport consultants ARUP warned that public acceptance of the Newport junction closures would likely be low and could increase congestion on alternative routes.
- The government plans to accelerate the delivery of new train stations at Cardiff Parkway, Magor, and Undy with support from Transport for Wales.