Only Landowners are able to apply for a Diversion Order and the Highway Authority has to agree to the new alignment as an improved and equally commodious route.
Dim ond Perchnogion Tir sy’n gallu gwneud cais am Orchymyn Gwyro ac mae’n rhaid i’r Awdurdod Priffyrdd gytuno i’r aliniad newydd fel llwybr gwell ac yr un mor hwylus.