The A55, also called the North Wales Expressway (Welsh: Gwibffordd Gogledd Cymru), is an important road in Great Britain. It goes between Chester, England and Holyhead, Wales. It goes along the north coast of Wales for most of its route. For most of the route, it is a dual carriageway. Many parts of the road act like a motorway. 

It is also part of the European route E22, which links to Amsterdam, Riga, and Moscow. The route once went between Bangor and Chester, but was extended to Holyhead in 2001. This links to the Republic of Ireland through the Port of Holyhead. In total, the road is  long.

Junctions
{| border=1 cellpadding=2 style="margin-left:1em; margin-bottom: 1em; color: black; border-collapse: collapse; font-size: 100%;" class="wikitable"
|- align="center" bgcolor="00703C" style="color: #FFD200;font-size:120%;"
| colspan="5" | A55 road junctions
|- align="center" bgcolor="000000" style="color: white"
| km
| Westbound exits (B Carriageway)
| Junction
| Eastbound exits (A Carriageway)
|- align="center"
|0.0
| Holyhead ,  (Pedestrians) (Motor vehicles)Fish quay, Park and ride,  Long stay
| 
| Start of road
|- align="center"
|
| Local traffic
| TOTSO
| Local traffic only
|- align="center"
|0.5
| Town centre A5154
| TOTSO
| Town centre A5154
|- align="center"
|0.7
| Trearddur Bay B4545, Kingsland
| J1
| Trearddur Bay B4545, Kingsland
|- align="center"
|1.22.0
| Trearddur Bay A5153 (B4545), Parc Cybi, Penrhos Stanley ,  Goods vehicles
| J2
| Trearddur Bay A5153 (B4545), Parc Cybi
|- align="center"
|7.17.7
| Valley A5
| J3
| Valley, Caergeiliog A5
|- align="center"
|9.610.2
| Caergeiliog A5, Boderdern
| J4
| Bryngwran A5, Boderdern
|- align="center"
|14.014.6
| Rhosneigr, Aberffraw A4080, Bryngwran (A5)
| J5
| Rhosneigr, Aberffraw A4080, Gwalchmai (A5)
|- align="center"
|23.224.0
| Rhostrehwfa A5, Llangefni (A5114)
| J6
| Pentre Berw A5, Llangefni (A5114)
|- align="center"
|27.828.6
| Gaerwen, Pentre Berw A5152 (A5)
| J7
| Gaerwen, Llanfair Pwllgwyngyll A5152 (A5)
|- align="center"
|31.3
| Llanfair Pwllgwyngyll A5, Star
| J7A
|  No access
|- align="center"
|32.933.4
| Benllech, Amlwch A5025
| J8
| Menai Bridge, Amlwch A5025
|- align="center" 
|33.8
| Llanfair Pwllgwyngyll A5(W), Menai Bridge A5(E), Beaumaris (A545)
| J8A
|  No access (on-slip only)
|- align="center"
|
| style=background:skyblue | Entering Isle of Anglesey
|
| 
|- align="center"
|34.134.4
| colspan=3 | Britannia Bridge
|- align="center"
|
| 
|
| style=background:skyblue | Entering Gwynedd
|- align="center"
|35.335.6
| Bangor, Caenarfon A487
| J9
| Bangor, Caenarfon A487
|- align="center"
|36.437.0
| Bangor A4087, Caenarfon (A487)
| J10
| Bangor A4087
|- align="center"
|40.340.9
| Bangor, Betws-y-Coed A5
| J11Services
| Betws-y-Coed A5
|- align="center"
|43.644.2
| Tal-y-bont
| J12
| Tal-y-bont
|- align="center"
|47.247.5
| Abergwyngregyn
| J13
| Abergwyngregyn
|- align="center"
|48.949.2
| Llanfairfechan
| J14
| Llanfairfechan
|- align="center"
|
| style=background:skyblue | Entering Gwynedd
|
| style=background:skyblue | Entering Conwy
|- align="center"
|51.7
| Llanfairfechan
| J15
| Llanfairfechan
|- align="center"
|52.853.7
| colspan=3 | Pen-y-Clip Tunnels
|- align="center"
|53.854.2
|  No access (on-slip only)
| J15A
| Penmaenmawr
|- align="center"
|56.2
| Penmaenmawr
| J16
| Penmaenmawr, Dwygyfylchi
|- align="center"
|
| Services
|
| No access
|- align="center"
|57.857.8
| Dwygyfylchi
| J16A
| No access
|- align="center"
|58.459.1
| colspan=3 | Penmaenbach Tunnels
|- align="center"
|60.461.0
| Conwy A547End of special road
| J17
| Conwy A547Start of special road
|- align="center"
|61.862.9
| colspan=3 | Conwy Tunnel<small>()
|- align="center"
|63.664.2
| Conwy (A547), Deganwy A546
| J18
| Deganwy A546, Llandudno Junction (A547)
|- align="center"
|64.865.5
| Betws-y-Coed, Llandudno A470
| J19
| Llandudno, Betws-y-Coed A470
|- align="center"
|68.769.8
| Rhos-on-Sea (B5115)
| J20
| Rhos-on-Sea B5115
|- align="center"
|70.671.0
| Colwyn Bay B5104
| J21
| Colwyn Bay B5104
|- align="center"
|71.572.0
| Old Colwyn (A547)
| J22
| Old Colwyn (A547)
|- align="center"
|76.076.1
| Llanddulas A547Start of special road
| J23Services
| Llanddulas A547End of special road
|- align="center"
|80.080.4
|  No access (on-slip only)
| J23A
| Pensarn, Rhyl A548
|- align="center"
|81.281.9
| Abergele, Rhuddlan A547
| J24
| Rhuddlan, Prestatyn A547
|- align="center"
|84.6
| Towyn, St. George 
| J24A
| No access
|- align="center"
|
| style=background:skyblue | Entering Conwy
| 
| style=background:skyblue | Entering Denbighshire
|- align="center"
|
| colspan=3 | Services
|- align="center"
|86.786.8
| Bodelwyddan, Glan Clwyd 
| J25
| Bodelwyddan, Glan Clwyd 
|- align="center"
|88.288.8
| St Asaph Business Park
| J26
| St Asaph Business Park
|- align="center"
|89.990.6
| St Asaph, Rhyl A525
| J27
| St Asaph, Rhyl A525
|- align="center"
|91.691.6
| Denbigh A525
| J27A
|  No access
|- align="center"
|92.993.2
| Rhuallt (B5429), Trefnant
| J28
| Rhuallt, Tremeirchion B5429
|- align="center"
|96.797.3
| Rhuallt, Tremeirchion (B5429)
| J29
| 
|- align="center"
|
| style=background:skyblue | Entering Denbighshire
| 
| style=background:skyblue | Entering Flintshire
|- align="center"
|99.099.3
| Tremeirchion
| J30
| 
|- align="center"
|100.3100.8
| Prestatyn A5151, Caerwys B5122
| J31
| Holywell A5026, Caerwys A5151 (B5122)
|- align="center"
|108.7108.8
| Holywell A5026
| J32
| Rhosesmor (B5123)
|- align="center"
|109.3109.9
| Rhosesmor B5123
| J32A
|  No access (on-slip only)
|- align="center"
|111.3111.4
| Pentre Halkyn, Rhosesmor
| J32B
|  No access
|- align="center"
|114.6115.3
| Flint A5119
| J33
| Mold, Flint A5119
|- align="center"
|116.5
| Connah's Quay B5126
| J33A
| Northop Hall
|- align="center"
|
| colspan=3 | Services
|- align="center"
|120.0
| Mold A494
| J33B
|  No access (on-slip only)
|- align="center"
|120.5128.8
| Queensferry A494
| J34TOTSO[See notes]
| Queensferry A494, Manchester (M56)
|- align="center"
|123.1123.6
| Buckley A550 (A549), Corwen (A5104)
| J35
| Wrexham A550
|- align="center"
|125.3125.9
| Pen-y-ffordd A5104
| J36
| Broughton, Pen-y-ffordd A5104
|- align="center"
|128.5
| Broughton (A5104)
| J36A
|  No access (on-slip only)
|- align="center"
|128.6
| style=background:skyblue | Entering  and Flintshire
| Border 
| style=background:skyblue | Entering  and Cheshire
|- Align="center"
|
| Wrexham, Chester A483
| J38
| Chester, Wrexham A483
|- align="center"
|
| colspan=3 | River Dee
|- align="center"
|
|  No access (on-slip only)
| J39
| Chester A5115, Whitchurch A41
|- align="center"
|
| Chester, Nantwich A51, Whitchurch (A41)
| J40
| Chester, Nantwich A51
|- align="center"
|
| Start of road
| rowspan="2"| M53 J12
| Chester, Helsby A56Non-motorway traffic
|- align="center"
|
| Chester A56
| Road continues as M53 towards Ellesmere Port
|-
| colspan=4 | Notes
Data from location marker posts are used to provide distance and carriageway identification information.  Where a junction spans several hundred metres and the data is available, both the start and finish values for the junction are shown.
Totso = "Turn off to stay on" meaning that the driver must leave the main carriageway to stay on the specified (A55) route.
|-
| colspan=4 | Coordinate list

References

Roads in the United Kingdom