Bydd yr astudiaeth gydnerthedd yn edrych ar y rhwydwaith cyfan o Gaergybi i gyffordd y Post House, a’r bwriad yw cwblhau cam cyntaf y gwaith ddiwedd yr haf, gan arwain at yr amserlen bresennol ar gyfer y gwelliannau sydd i ddechrau ym mis Medi.
The resilience study will look at the whole network from Holyhead to Post House junction and the first stage of the work is intended to be completed late summer, feeding into the existing schedule for improvements commencing from September.