A wnaiff y Gweinidog egluro pam mae gwelliannau peirianyddol i'r A465 rhwng cyffordd Brynmawr a Glanbaiden wedi arwain at derfyn cyflymder o 50 mya?
Wedi'i ateb gan Y Dirprwy Weinidog Newid Hinsawdd | Wedi'i ateb ar 28/06/2021
The dualling of the road will help to improve traffic flow, reduce journey time, enhance road safety and improve resilience in this area whilst considering the impact on the environment.
This section of the A465 passes through the Brecon Beacons National Park and is adjacent to areas of landscape which have the highest level of environmental protection and incredibly challenging topography.
Designing this section for higher design speeds would have had a much greater impact on this important environment.