Pa ystyriaeth y mae Llywodraeth Cymru wedi'i rhoi i gael gwared ar y terfynau cyflymder o 50 mya ar yr M4 yng Nghasnewydd a dychwelyd i derfyn cyflymder o 70 mya?
Wedi'i ateb gan Dirprwy Weinidog dros Drafnidiaeth | Wedi'i ateb ar 15/10/2026
The 50 mph speed limits on sections of the M4 around Newport remain in place and there are currently no immediate plans to reinstate a 70 mph limit. As with any part of the strategic road network, speed limits may be reviewed in the future if there is a clear case and need to do so.