During the road closure, the opportunity was also used to carry out additional resurfacing work along the closed length of A487 carriageway to rectify some existing carriageway defects.
Tra roedd y ffordd ar gau, manteisiwyd ar y cyfle hefyd i wneud gwaith ail-wynebu ychwanegol ar hyd y darn caeedig o gerbytffordd yr A487 i unioni rhai o ddiffygion presennol y gerbytffordd.