Pa strategaeth sydd ar waith i liniaru tagfeydd ar yr A55 ar adegau pan fydd twnnel Conwy ar gau?
Wedi'i ateb gan Ysgrifennydd y Cabinet dros Drafnidiaeth a Gogledd Cymru
| Wedi'i ateb ar 28/10/2025
There is a long-standing established diversion route for when the Conwy Tunnel is closed. It utilises the A470 and A5 trunk road network. The diversion plan is shared with the Local Resilience Forum which includes the relevant Local Authorities. However, drivers with local knowledge will use local roads and drivers will also use their SatNavs.