Pryd y bydd astudiaeth gwytnwch Llywodraeth Cymru i'r M4, yr A55 a'r A494 yn cael ei chyhoeddi?
Wedi'i ateb gan Dirprwy Weinidog dros Drafnidiaeth | Wedi'i ateb ar 15/06/2026
We are planning to publish the A55, A494 and A483 Transport Needs and Resilience Review during summer/autumn 2026 and the M4 Resilience Study is planned to be published in the New Year.
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)