I ddangos bod y camerâu'n monitro terfynau cyflymder er mwyn yr amgylchedd yn hytrach nag at ddibenion diogelwch ar y ffyrdd, mae gardiau camera gwyrdd wedi cael eu gosod arnynt, yn hytrach na'r gardiau melyn safonol.
To highlight that the cameras are monitoring speed limits provided for environmental and not road safety reasons, green coloured camera shields have been added to them as an alternative to the standard yellow shields.