The Order will temporarily prohibit vehicles on lengths of the M4 motorway between Junction 23a (Magor), Monmouthshire and Junction 34 (Miskin), Rhondda Cynon Taf and the A48(M).
Bydd y Gorchymyn yn gwahardd cerbydau dros dro ar ddarnau o draffordd yr M4 rhwng Cyffordd 23a (Magwyr), Sir Fynwy a Chyffordd 34 (Meisgyn), Rhondda Cynon Taf a’r A48(M).