The Order will temporarily prohibit and restrict traffic on lengths of the A55 trunk road at, or near, the Penmaenbach Tunnel, Conwy.
Bydd y Gorchymyn yn gwahardd a chyfyngu ar draffig dros dro ar ddarnau o gefnffordd yr A55 wrth, neu gerllaw i, Dwnnel Penmaen-bach, Conwy.