This contract was entered into in October 2020 and governs delivery of the dualling of the final sections of the Heads of Valleys Road, where construction is already well underway.
Ymrwymwyd i’r contract hwn ym mis Hydref 2020 ac mae’n llywodraethu’r gwaith o wneud rhannau olaf o Heol Blaenau’r Cymoedd yn ddeuol, lle mae’r gwaith adeiladu eisoes wedi hen ddechrau.