The Order will temporarily restrict and prohibit vehicles on a length of the A483 trunk road between the Powys/Carmarthenshire border (near Sugar Loaf) and Llanymynech.
Bydd y Gorchymyn yn cyfyngu ar a gwahardd cerbydau dros dro ar ddarn o gefnffordd yr A483 rhwng ffin Powys/Sir Gaerfyrddin (ger Dinas-y-bwlch) a Llanymynech.