Holyhead
| Holyhead Caergybi | |||
| Location Map | |||
| |||
| County | |||
| Anglesey | |||
| Highway Authority | |||
| Isle of Anglesey | |||
| Forward Destination on | |||
| A55 | |||
| Next Primary Destinations | |||
| Bangor | |||
| Places related to the A55 | |||
| Abergele • Bangor (Caernarfonshire) • Chester • Conwy • Flint • Prestatyn • Queensferry • Rhyl • St Asaph | |||
Holyhead / Caergybi is a town and Irish Sea port on Holy Island, west of the main island of Anglesey in northwest Wales. There are regular ferry sailings between Holyhead and Dublin in Ireland. There used to be sailings from here to other ports as well, such as Dún Laoghaire, but these have since ceased.
The A5 and A55 roads terminate near the ferry terminal.
Routes
| Route | To | Notes |
| Bangor | Northern terminus is at Ferry terminal roundabout | |
| Penrhos, Y Fali / Valley | London Road to A5153 signed as Traffig lleol / Local traffic | |
| (From eastbound A5:) Bangor (A55) | 850 metre link A5 to A55 to B4545 | |
| (Northbound:) Canol y dref / Town centre | Victoria Road: former route of the A5 towards Admiralty Arch | |
| Bai Trearddur / Trearddur Bay, Kingsland | ||
| Dublin | Operated by Irish Ferries and Stena Line | |
| Dun Laoghaire |
