Advertisement 16 April 2013 at 7:22am Roads: A55, Britannia Bridge Strong winds on the A55 Britannia Bridge between J8A A5 Ffordd Caergybi / Holyhead Road (Llanfair P.G.) and J9 A487 (Treborth) mean there's a 30 mph speed limit. Last updated Sun 3 Nov 2013 UK A55 Britannia Bridge Share Tweet Plus Reddit