The Order will temporarily restrict and prohibit vehicles on a length of the A470 trunk road between the Powys/Merthyr Tydfil county boundary and Builth Wells.
Bydd y Gorchymyn yn cyfyngu ar a gwahardd cerbydau dros dro ar ddarn o gefnffordd yr A470 rhwng ffin sirol Powys/Merthyr Tudful a Llanfair-ym-Muallt.