“We know there is a consensus that 20mph is the right speed on many of our roads near schools, hospitals, play areas and built-up areas.
"Rydyn ni'n gwybod bod consensws mai 20mya yw'r cyflymder cywir ar lawer o'n ffyrdd ger ysgolion, ysbytai, ardaloedd chwarae ac ardaloedd adeiledig.