Mae bwriad i gadw y system ffordd ddeuol gul tan Mawrth 12 rhwng Cyffordd 24 a 23 i’r gorllewin.  Mae’r manylion llawn, gan gynnwys manylion y gwaith dros dro arwefan Traffig Cymru(dolen allanol).
The dual narrow-lane system is scheduled to be in place until March 12 between J24 and J23 westbound.  Full details, including details of overnight works are on theTraffic Wales website(external link).