We consulted on improvements to the A465 between Abergavenny and Hirwaun in 1994 as part of the process to develop the preferred route for the whole project.
Gwnaethom ymgynghori ar welliannau i’r A465 rhwng y Fenni a Hirwaun ym 1994 fel rhan o’r broses o ddatblygu’r llwybr a ffefrir ar gyfer y prosiect cyfan.