Mae’r arweiniad yn gofyn yn benodol i awdurdodau priffyrdd sicrhau eu bod yn ystyried barn a phryderon cymunedau wrth gynnal yr adolygiad.  O safbwynt Llywodraeth Cymru, mae hynny’n golygu ystyried pob gohebiaeth â chymunedau am gyflymder a diogelwch wrth gynnal yr adolygiadau.  Mae gofyn hefyd ystyried data am wrthdrawiadau traffig ar y ffyrdd.  Daw’r adolygiad o derfynau cyflymder ar y rhwydwaith cefnffyrdd i ben ddiwedd mis Rhagfyr 2014.
The guidance specifically asks highway authorities to ensure that they take the views and concerns of communities into consideration when undertaking the review.  For Welsh Government this means ensuring all correspondence with communities relating to speed and safety are taken into account in the reviews.  It also requires the road traffic collision data to be considered. The review of speed limits on the trunk road network will be completed by the end of December 2014.