This page gives information on all current motorways and A-class roads in Northern Ireland. You may find a current network map useful. You will also find below a list of all sections of dual-carriageway currently in existence in Northern Ireland. Click here for an explanation of how our roads are numbered. Finally, if you ever wondered what our busiest road is click here.

Motorways
Click each motorway for more details. Pages with a have a strip map of junctions.

Route Number	Route	Length (km)	Length (miles)
M1	Belfast to Dungannon	61.6	38.3
M2 and M22	Belfast to Randalstown	35.9	22.5
M2 Ballymena	Ballymena Bypass	7.7	4.8
M3	Cross Harbour Link, Belfast	1.3	0.8
M12	M1 to Craigavon	2.7	1.7
M5	M2 to Hazelbank	2.3	1.4
A8(M)	M2 to Corr's Corner	1.6	1.0

See an explanation of the different types of junction you will find on our motorways.

A-Class Roads

Click each route summary for a map showing the road. A few of these roads have further information - click the road number for more details. Pages with a have a strip map of junctions. The lengths below are were calculated with Google Maps, and I have subsequently found that this is not always accurate, so please treat them as being for illustrative purposes only.

Route Number	Route Summary *	Length (km)	Length (miles)
A1 [3]	Belfast to Newry	69.7	43.3
A2 [3]	Derry to Newry	393.5	244.6
A3	Lisburn to Middletown	74.7	46.4
A4	Portadown to Belcoo	98.4	61.2
A5	Londonderry to Aughnacloy	86.8	53.9
A6 [3]	Belfast to Londonderry	113.9	70.8
A7	Carryduff to Downpatrick	24.2	15.0
A8	Glengormley to Larne	25.6	15.9
A11	Belfast Inner Ring	4.2	2.6
A12	Belfast Westlink	3.0	1.9
A20 [3]	Belfast to Portaferry	49.0	30.4
A21	Bangor to Saintfield	35	21.8
A22	Dundonald to Downpatrick	34.3	21.3
A23	Belfast to Ballygowan	13.1	8.1
A24	Belfast to Clough	37.3	23.2
A25	Monaghan Border to Strangford	87.0	54.1
A26	Coleraine to Banbridge	104.3	64.8
A27	Newry to Craigavon	37.8	23.5
A28 [2]	Newry to Armagh to Aughnacloy	57.9	36.0
A29	Portrush to Louth border	146.1	90.8
A30	Lisburn to Glenavy	15.8	9.8
A31	Moneymore to Castledawson	10.9	6.8
A32	Omagh to Swanlinbar	56.0	34.8
A34	Maguiresbridge to Clones	23.6	14.7
A35	Irvinestown to Pettigoe	17.3	10.8
A36	Ballymena to Larne	26.5	16.5
A37	Limavady to Coleraine	18.2	11.3
A37	Cullaville to Cullaville	5.4	3.4
A38	Strabane to Lifford	0.8	0.5
A40	Londonderry to Border	6.8	4.2
A42	Maghera to Carnlough	54.7	34.0
A43	Ballymena to Glenarriff	28.2	17.5
A44	Ballycastle to Clogh Mills	24.0	14.9
A45	Tamnamore to Granville	15.9	9.9
A46	Enniskillen to Belleek	39.6	24.6
A47 [1]	Enniskillen to Belleek	42.2	26.2
A48	Newtownards to Donaghadee	11.8	7.3
A49	Lisburn to Ballynahinch	15.8	9.8
A50	Portadown to Newcastle	49.0	30.5
A51	Armagh to Gilford	22.6	14.0
A52	Belfast to Crumlin	22.1	13.7
A54	Coleraine to Castledawson	46.5	28.9
A55	Belfast Outer Ring	26.1	16.2
A57	Ballynure to Aldergrove	20.9	13.0
A76	M1 to Lurgan	2.5	1.6
A99	Millennium Way, Lurgan	0.8	0.5
A101	Sprucefield	0.8	0.5
A211	Comber town centre	1.1	0.7
A371	Limavady town centre	3.3	2.1
A501 [3]	Belfast to Rural A30	18.0	11.2
A505	Omagh to Cookstown	40.1	24.9
A509	Enniskillen to Cavan border	27.9	17.3
A510	Albertbridge Road, Belfast	2.1	1.3
A512	Lisburn to Dunmurry	4.6	2.9
A513	North Lisburn Feeder Road	2.9	1.8
A514	Derry	3.3	2.1
A515	Derry	6.4	4.0
A519	Lisburn	2.9	1.8
A520	Lisburn	2.0	1.2
A522	Antrim town centre	2.0	1.2
A523	Ballymena town centre	2.4	1.5

Note: The SABRE community maintains a wiki with details on A-roads in Northern Ireland which you may also find useful, or indeed wish to contribute to.

*In urban areas, especially Belfast, it is difficult to trace route numbers. The routes shown in these areas may therefore be wrong - I am open to correction if anyone has official information.
[1] The section from Kesh to St Angelo Airport was added to the A47 in 2013 by promoting the B82.
[2] The short section from Aughnacloy to Augher was deleted from the A28 in 2013.
[3] Routes in Belfast City Centre confirmed via the "The Roads (Speed Limit) (No. 3) Order (Northern Ireland) 2014".

Sections of Dual-Carriageway in Northern Ireland

This is a list of sections dual-carriageways in Northern Ireland. It has not been updated since around 2008 so is out of date in some sections. I intend to slowly update the information below or replace it with information on the route numbers above.