Pryd comisiynwyd yr astudiaeth gwytnwch i'r M4, yr A55 a'r A494 gan Lywodraeth Cymru?
Wedi'i ateb gan Dirprwy Weinidog dros Drafnidiaeth | Wedi'i ateb ar 15/06/2026
The A55, A494 and A483 Transport Needs and Resilience Review was commissioned in December 2025, and we intend to commission the M4 Resilience Study during the summer/autumn of 2026.
The above full corridor studies are separate from the focussed activity currently underway on the Menai Crossing and the M4 around Newport. (Saesneg yn unig)