Mae adborth o Ymgyrch Ugain, yr ymgyrch ymgysylltu â modurwyr dan arweiniad yr heddlu, a gyhoeddwyd y mis hwn hefyd, yn dangos bod y rhan fwyaf o gerbydau’n gyrru o dan y trothwy gorfodi presennol.
Feedback from Operation Ugain, the police led motorist engagement campaign, also published this month, shows that most vehicles are driving below the current enforcement threshold.