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The M4 between Newport and Swansea is one of our key corridors and international gateways for the south Wales economy.

It provides access to Cardiff airport, and the ports of Newport, Cardiff, Port Talbot, Swansea, Pembroke, Milford Haven and Fishguard. The volume of traffic places pressure on the M4, especially during peak times, as it passes through Newport and approaches Cardiff and Swansea junctions.