It will include publication of the number of offences captured on that stretch of motorway and a grace period for drivers during which those who exceed the stated limit will receive warning notices.
Bydd yn cynnwys cyhoeddi nifer y troseddau sy’n digwydd ar y rhan honno o’r draffordd a chyfnod arbennig i yrwyr, pryd fydd y rhai sy’n mynd dros y terfyn cyflymder yn derbyn rhybudd.