A55 road

A55
North Wales Expressway
Looking westbound towards J10 Bangor, with Ysbyty Gwynedd in the distant.
Route information
Part of E22
Maintained by
National Highways (England)
North and Mid Wales Trunk Road Agent
Length87 mi (140 km)
Existed1922–present
HistoryCompleted: 2001
Major junctions
West endHolyhead
Major intersections
J2 ->A5153 road

J5 ->A4080 road

J6 ->A5114 road

J7 ->A5152 road

J8 ->A5025 road

J9 → A487 road

J10 ->A4087 road

J11 → A5 road

J17 ->A547 road

J18 ->A546 road

J19 → A470 road

J23a ->A548 road

J27 ->A525 road

J31 ->A5151 road

J32 ->A5026 road

J33 ->A5119 road

J34 → A494 road

J35 ->A550 road

J36 ->A5104 road

J38 → A483 road
/
J39 → A41 road/A5115 road

J40 → A51 road

M53 motorway
East endChester
Location
CountryUnited Kingdom
CountiesAnglesey, Gwynedd, Conwy, Denbighshire, Flintshire, Cheshire
Primary
destinations
Holyhead
Bangor
Conwy
Chester
Road network
A54 A56

The A55, also known as the North Wales Expressway (Welsh: Gwibffordd Gogledd Cymru), is a major road in Wales and England, connecting Cheshire and North Wales. The vast majority of its length from Chester to Holyhead is a dual carriageway primary route, with the exception of the Britannia Bridge over the Menai Strait and several short sections where there are gaps in between the two carriageways. All junctions are grade separated apart from a roundabout east of Penmaenmawr and another nearby in Llanfairfechan. Initially, the road ran from Chester to Bangor. In 2001, it was extended across Anglesey to the ferry port of Holyhead parallel to the A5. The road improvements have been part funded with European money, under the Trans-European Networks programme, as the route is designated part of Euroroute E22 (HolyheadLeedsAmsterdamHamburgMalmöRigaMoscowPermEkaterinburgIshim).