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List of A roads in Northern Ireland

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A List of A roads in Northern Ireland.

Road From To Notes
A1 Belfast Killeen Via Lisburn and Newry. Forming part of the main route from Belfast to Dublin. Becoming the N1 at the border, joining onto the Southern Irish M1 before Dundalk.
A2 Derry Newry Northern Irish coastal road. Including routes such as Belfast-Bangor, Belfast-Carrickfergus, Newry-Warrenpoint and Derry-Limavady
A3 Lisburn Cavan Via Craigavon and Armagh. Becomes the N12 at Middletown until Monaghan, then the N54 to Cavan via southern Fermanagh.
A4 Craigavon (Portadown) Belcoo Via Dungannon and Enniskillen. Becomes the N16 at the border towards Sligo.
A5 Derry Aughnacloy Via Strabane and Omagh. Becomes the N2 after the Aughnacloy at the border towards Dublin.
A6 Derry Belfast Via Dungiven, Antrim and Glengormley.
A7 Carryduff Downpatrick Via Saintfield. Stemming off the A24, it forms most of the main road from Belfast to Downpatrick.
A8 Glengormley Larne Via Ballynure. Stemming from the A6.
A9 - A10 Unused
A11 Belfast Inner Ring Road
A12 Belfast (Broadway) Belfast (York Street) Westlink dual-carriageway in Belfast
A13 - A19 Unused
A20 Belfast (Bridge End) Portaferry Via Dundonald and Newtownards
A21 Bangor Ballynahinch Via Newtownards and Comber and Ballygowan
A22 Dundonald Downpatrick Via Comber, Killinchy and Killyleagh.
A23 Belfast Ballygowan Via Moneyreagh.
A24 Belfast (Cromac Street) Clough Via Carryduff and Ballynahinch. Forms the greater part of the route from Belfast to Newcastle, and Kilkeel.
A25 Strangford Altnamackan Via Downpatrick, Clogh, Rathfriland, Newry and Newtownhamilton. Becomes the R182 at the border and carries on towards Castleblaney.
A26 Coleraine Banbridge Via Coleraine, Ballymena, Antrim, Moira, Craigavon (Lurgan) and Warringstown.
A27 Newry Craigavon (Portadown)
A28 Newry (Sheepsbridge) Aughnacloy Via Markethill, Armagh and Caledon.
A29 Portrush Ballymaclosha Via Maghera, Cookstown, Dungannon, Armagh, Keady and Newtownhamilton. At the border it becomes the R177 and carries on towards Dundalk.
A30 Lisburn Glenavy
A31 Moneymore Castledawson Form part of the route connecting Cookstown to Belfast.
A32 Omagh Swanlinbar Via Enniskillen. Becomes the N87 at the border.
A33 Newtownbutler Republic of Ireland border west of Clones Became a portion of a rerouted A34 by the 1970s.
A34 Maguiresbridge Clones Via Lisnaskea and Newtownbutler. Becomes the R183 road at the border
A35 Irvinestown Pettigo Via Kesh. Becomes the R234 at the border.
A36 Ballykeel Ballyrickard Via Moorfields and Killwaughter. Forms the main route from Larne to Ballymena.
A37
(Co. Londonderry)
Macosquin Limavady Part of the Coleraine to Derry route.(North)
A37
(Co. Armagh)
Dundalk Castleblayney Only a short stretch of this route actually lies within Northern Ireland. The rest of the route being called the N53.(South)
A38 Strabane Lifford Less than a mile lies in Northern Ireland crossing the River Foyle and divides into the N14 to Letterkenny and N15 to Sligo.
A39 Maguiresbridge Lisnaskea Became a portion of a rerouted A34.
A40 Derry city centre Carrigans West of the River Foyle, becomes the R236 at the border which carries on towards Raphoe.
A41 Unused
A42 Maghera Carnlough Via Portglenone, Ahoghill, Galgorm, Ballymena and Broughshane.
A43 Ballymena Glenarriff Via Martinstown.
A44 Ballycastle A26 north of Cloughmills Via Armoy.
A45 Granville Tamnamore Via Dungannon and Coalisland
A46 Enniskillen Belleek Becomes the N3 at the border which carries on towards Ballyshannon.
A47 Enniskillen (Trory) Belleek Via Killadeas, Lisnarick, Kesh, Boa Island and Leggs.
A48 Newtownards Donaghadee Via Six Road Ends.
A49 Lisburn Ballynahinch
A50 Craigavon (Portadown) Newcastle Via Gilford, Banbridge, Katesbridge and Castlewellan.
A51 Gilford Armagh Via Tandragee and Hamiltonsbawn.
A52 Belfast (Carlisle Circus) Crumlin Via Nutt's Corner.
A53 Cookstown Orritor Declassified.
A54 Castledawson Coleraine Via Bellaghy and Kilrea.
A55 Belfast Outer Ring Road
A56 Unused
A57 Belfast International Airport Ballynure Via Templepatrick and Ballyclare. Forms part of the main route connecting the airport with Belfast City and Larne.
A58 - A67 Unused
A68 High Street, Belfast York Road station, Belfast via Corporation Street; now part of the A2 one-way system. It is unknown why the A68 number was chosen; an A5xx number (which were allocated to Belfast until the A505), the A56 (was and still is the lowest available number) or an A1x number (later allocated to central Belfast roads) would have been more logical.
A69 - A75 Unused
A76 M1 Craigavon (Lurgan)
A77 - A96 Unused
A97 Number appears on 1940s maps; typo for the A37 running through Cullaville.
A98 Unused
A99 A3 Edward Street, Lurgan A26/B3 in Lurgan Millennium Way; one sign showed "A3", but this is incorrect.
A101 M1 Sprucefield, near Lisburn
A211 Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004
A221 Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004. Officially known as A211, but signed as A221.
A371 Various roads in Limavady town centre, designated when the A37 Limavady Bypass was opened in 2004
A500 Donegall Street, Belfast Whitla Street, Belfast The northern section is now part of a rerouted A2 and the southern half unclassified.
A501 Belfast A30 just east of Glenavy
A502 Unused
A503 Donegall Square, Belfast Shaftesbury Square, Belfast via Howard Street and Great Victoria Street; former portions of the B38 and B23. Later became part of the A1 one-way system and is now part of the A1 and A11.
A504 Dundonald Newtownbreda Formerly a section of the B205 before it was upgraded as part of work to give Belfast an outer ring road. Now part of the A55.
A505 Omagh Cookstown Via Mountfield.
A506 - A507 Unused
A508 Antrim Rathbeg via Belmont Road, Ballycraigy Road and Greystone Road (former B95); the section along Belmont Road is now part of a rerouted A6 and the remainder downgraded to Class II status: Ballycraigy Road is now the B518 and Greystone Road returned to the B95.
A509 Enniskillen Belturbet Becomes the N3 at the border after Derrylin.
A510 Belfast (Cromac Street) Ballymacarrett (Albertbridge Road) Formerly numbered as A20.
A511 Unused
A512 Old Golf Course link road in West Belfast and North Lisburn
A513 Ballymacash Derriaghy Lisburn Feeder Road
A514 Derry Ring Road (Crescent Link)
A515 Derry Ring Road (Foyle Bridge and Skeoge Link Road)
A516 - A518 Unused
A519 Tonagh Ballymacash Distributor road in western Lisburn
A520 Ballymacash Knockmore Link between the A3 and the A519 in Western Lisburn
A521 Unused
A522 Dublin Road, Antrim Belmont Road, Antrim Former route of the A6 through Antrim town centre.
A523 Ballymena Town Centre Ballee Roundabout, Ballymena Former route of the A26 through Ballymena.