At the same time, it is recognised that a speed limit of 20mph may not be appropriate for all restricted roads and an ‘exceptions process’ has therefore been developed.
Ar yr un pryd, cydnabyddir efallai nad yw terfyn cyflymder o 20mya yn briodol ar gyfer pob ffordd gyfyngedig ac felly mae ‘proses eithriadau’ wedi’i datblygu.