The proposed Order is required to introduce a 50mph speed limit on lengths of the A465 trunk road between Brynmawr, Blaenau Gwent and Glanbaiden, Monmouthshire.
Bydd y Gorchymyn arfaethedig yn cyflwyno terfyn cyflymder 50mph ar hyd rhannau o'r A465 rhwng Brynmawr, Blaenau Gwent a Lanbaiden, Sir Fynwy.