The A40 between Abergavenny and Crickhowell is a narrow, fast trunk road and totally unsuitable to cycling. This is a vital connecting route in the area, between two neighbouring towns. There are sections where it is easily wide enough for a proper, separate 2m wide cycle path, or a wider shared use path with pedestrians.
This is a critical issue if the Usk valley is to be made accessible to people riding bikes.
More detail on the issue on the ACG website: http://abergavennycyclegroup.org.uk/cycle-route-to-crickhowell/