Sandbox: Northern Ireland original road numbers

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pulled off of [1], [2], [3], [4], [5], [6] and [7]

The six county council areas, plus the county borough of Derry were published on December 14th 1923, the routes in the county borough of Belfast published on December 21st 1923.

By authority

Antrim

Al  Belfast via Lisburn, Banbridge and Newry to Dundalk.
A2  (Coast Road)
A3  Belfast via Lisburn, Lurgan, Portadown and Armagh to Monaghan.
A6  Belfast via Antrim, Toome Bridge, Maghera, Dungiven and Claudy to Londonderry.
A8  Belfast via Ballynure to Larne 
A26 Banbridge via Lurgan, Antrim, Ballymena and Ballymoney to Coleraine.
A29 Portrush to Coleraine.
A30 Lisburn to Glenavy for Antrim.
A36 Ballymena to Larne

B12 Glenavy to Moira.
B13 Belfast to Crumlin.
B14 Cushendall to Park more on B61.
B15 Armoy to Ballycastle (Glenshesk Road).
B16 Ballymoney via Carnageeragh to B63.
B17 Bushmills to Coleraine
B18 Ballymena to Toome.
B19 Ballymena via Portglenone to Maghera.
B23 Belfast (Malone Road) to Lisburn.
B24 Lisburn to Ballynahinch.
B38 Belfast to Glenavy.
B39 Belfast via Ligoniel to Antrim.
B52 Randalstown to Portglenone.
B53 Randalstown to B59.
B55 Kerr Street, Portrush.
B56 A8 at Ballyhenry to B57.
B57 Ballynure to Templepatrick.
B58 Ballynure to Carrickfergus.
B59 Belfast (B56) to Ballymena (A36) via Doagh
B60 Ballymena to Carnlough.
B61 Ballymena to Glenariff.
B62 Ballymena via Ballymoney to Portrush.
B63 Ballymena (A26)to Ballycastle.
B64 Connects B62 with B70.
B66 Bushmills via Ballymoney to Limavady.
B67 Ballycastle to Coleraine.
B70 B62 via Kilrea to Limavady.
B86 Dervock (B66) to B67.

Armagh

Al  Belfast via Lisburn, Banbridge and Newry to Dublin.
A3  Belfast via Lurgan, Portadown, and Armagh to Monaghan.
A4  Portadown to Dungannon.
A25 Downpatrick via Newry and Newtownhamilton to Castleblayney.
A26 Antrim via Glenavy and Lurgan to Banbridge.
A27 Newry via Tanderagee to Portadown.
A28 Newry via Markethill, Armagh, Augher and A4 to Enniskillen.
A29 Portrush via Coleraine, Cookstown, Dungannon, Armagh, and Keady to Dundalk.
A37 Dundalk via Castleblayney to Londonderry.

B2  Lurgan via Charlestown to Portadown.
B3  Lurgan via Gilford, Tanderagee and Keady to Ballybay.
B10 Banbridge via Scarva to A27.
B28 Banbridge via Gilford and Portadown to Moy.
B29 Armagh to Tanderagee.
B30 Newry via A25, Crossmaglen, Cullaville to Carrickmacross.
B31 Armagh via A29 to Newtownhamilton.
B32 Keady to Castleblayney.
B33 Keady via B3 to Monaghan.
B76 Lurgan to Kinnegoe.
B77 Portadown via Loughgall to Armagh.
B78 Portadown via A27 to Markethill.
B79 Newry to Carlingford.

Down

Al  Belfast via Lisburn and Banbridge to Newry.
A2  Coast Road, Belfast via Bangor to Donaghadee and Clough via Newcastle and Kilkeel to Newry.
A3  Belfast via Lisburn, Moira, Lurgan and Portadown to Armagh.
A7  Belfast via Saintfield to Downpatrick.
A20 Belfast via Newtownards to Portaferry.
A21 Bangor via Newtownards and Saintfield to Ballynahinch.
A22 Belfast via Comber and Killyleagh to Downpatrick.
A23 Belfast to Ballygowan.
A24 Belfast via Ballynahinch to A25.
A25 Strangford via Downpatrick, Castlewellan and Rathfriland to Newry.
A26 Banbridge via Lurgan, Antrim and Ballymoney to Coleraine.
A27 Newry to Portadown.

Bl  Downpatrick to Ardglass.
B2  Downpatrick via Dromore and Lurgan to Portadown.
B3  Lurgan via Gilford to Tanderagee.
B5  Greyabbey to Ballywalter.
B6  Lisburn to Saintfield.
B7  Killyleagh via Crossgar, Ballynahinch and Dromara to Rathfriland.
B8  Newry via Hilltown to A25.
B9  Donaghcloney Road from A26 to B2.
B10 Banbridge via Scarva to A27.
Bll Donaghadee via Ballywalter, Portaferry to Clough at A2.
B12 Glenavy to Moira.
B20 Crawfordsburn, Shore Road.
B21 Bangor to Donaghadee.
B22 Newtownards to Donaghadee
B23 Belfast via Malone Road to Lisburn.
B24 Lisburn to Ballynahinch.
B25 Dromore (Al) via Rathfriland to Rostrevor.
B26 Newcastle via Castlewellan to Banbridge.
B27 Newry (B8) via Hilltown and Kilkeel to Greencastle.
B28 Banbridge via Gilford and Portadown to Moy.

Fermanagh

A3  Belfast via Portadown to Monaghan.
A4  Belfast via Portadown, Dungannon and Enniskillen to Sligo.
A32 Omagh, Trillick, and Enniskillen to Longford.
A33 Clones to Newtownbutler (connects A3 and A34).
A34 Enniskillen via Lisnnskea and Newtownbutler to Cavan.
A35 Enniskillen via Irvinestown, Kesh and Pettigo to Donegal.
A39 Lisnaskea to Maguiresbridge (connects A34 and A4).

B4  Cookstown via Omagh to Kesh.
B36 From A34 at Donagli via Rosslea to Monaghan.
B37 Ballyshannon along South side of Lough Erne, through Enniskillen to Belturbet.
B52 Belleek via Garrison, and Belcoo to A4.
B53 Garrison to Manorhamilton.
B72 Pettigo via Belleek to Bundoran.
B80 Enniskillen to Tempo.
B81 Enniskillen  (from B37) to Derrygonnelly.
B82 Enniskillen  (from A32) via Trory to Kesh.

Londonderry

A2  Coast Road.
A5  Londonderry via Strabane and Omagh to Monaghan.
A6  Belfast via Maghera, Dungiven and Claudy to Londonderry.
A26 Banbridge via Ballymoney to Coleraine.
A29 Portrush via Coleraine, Cookstown,  Dungannon and Keady to Dundalk.
A31 Moneymore (A29) Via Magherafelt and Castledawson to A6.
A37 Limavady to A29 for Coleraine.

B17 Coleraine to Bushmills.
B19 Maghera (A6) via Portglenone to Ballymena.
B40 Magherafelt via Draperstown and Feeny to A6.
B41 Tobermore to Draperstown.
B42 Tobermore to A6 at Ranaghan Bridge.
B44 A6 via Learmount to Claudy.
B48 Londonderry via A5 to Omagh.
B49 Claudy via  Dunnamanagh and A5 to Strabane.
B64 Ballymena via B62 and Kilrea to Dungiven
B65 Coleraine via A29, Kilrea, and Portglenone to A5 at Castledawson.
B66 Limavady via A37 and Agivey Bridge to Ballymoney.
B67 Coleraine to Ballycastle.
B68 Limavady to Dungiven.
B69 Limavady to Claudy.
B70 B66 at Ringsead to Garvagh.
B71 Londonderry to Letterkenny.
B72 Cookstown via Coagh to Newport Trench.
B74 Foreglen Road. connecting A6 near Burntollct with A6 near Dungiven.
B75 A29 at Grillagh Bridge to Kilrea.

Tyrone

A4  Belfast via Portadown, Duugannon and Enniskillen to Manorhamilton.
A5  Londonderry via Strabane, Omagh, Aughnacloy to Monaghan.
A28 Enniskillen via A4, Aughnacloy and Armagh to Newry.
A29 Portrush via Coleraine, Cookstown, Dungannon and Keady to Dundalk.
A32 Omagh, Trillick and Enniskillen to Longford.
A35 Enniskillen via Irvinestown, Kesh and Pettigo to Donegal.
A38 Strabane to Lifford.

B4  Cookstown via Pomeroy, Omagh and Lack to Kesh.
B34 Cookstown via Dungannon to A4 for Portadown.
B35 Dungannon via Aughnacloy to Monaghan
B43 Dungannon via Pomeroy to A4.
B45 Dungannon via Caledon to Monaghan.
B46 Newtownstewart via B47 to Gortin.
B47 Newtownstewart to Plumbridge.
B48 Londonderry via A5 and Dunnamanagh to Omagh.
B49 Strabane via A5 and Dunnamanagh to Claudy.
B50 Omagh via Drumquin and Castlederg to Castlefinn.
B72 Strabane via A5, Victoria Bridge, Castlederg, Pettigo, and Belleek to Bundoran.
B73 Cookstown via Coagh to Newport Trench.
B83 Omagh via A5 and Clogher to Monaghan.
B84 Newtownstewart via Drumquin to Dromore.
B85 Strabane via Claudy to Castlennn.

Borough of Londonderry

A2  Coast Road                          Limavady Road, Bond's Hill, Duke Street, John Street, Foyle Street, Strand Road, Buncrana Road.
A5  Dublin via Strabane to Londonderry  Victoria Road.
A6  Belfast to Londonderry              Spencer Road, Dungiven Road, Clooney Terrace.

B71  Londonderry to Letterkenny.   Letterkenny Road, Foyle Road.
B507 From A2 to B71                Lone Moor Road, Upper Road, Northland Road, Rock Road.
B508                               Aberoom Road, Bishop Street Without.

Borough of Belfast

Al   Belfast to Dublin      Donegall Sq N from East frontage of Donegall Place, Donegall Sq West, Bedford Street, Dublin Road, Bradbury Place, Lisburn Road to City Boundary.
A2   Coast Road             Shore Road from City Boundary, York Road, Whitla Street, Garmoyle Street, Corporation Street, Victoria Street to
Upper Ann St, Queen's Bridge, Bridge End, Newtownards Road, Holywood Road to City Boundary.
A6   Belfast to Londonderry Donegall Place, Royal Avenue, Upper Donegall Street, Clifton Street, Antrim Road to City Boundary.
A20  Belfast to Portaferry  Donegall Square South, May Street, Oxford Street from May Street to East Bridge Street, East Bridge Street, Albertbridge Road to Newtownards Road, Upper Xewtownards Road to City Boundary.
A23  Belfast to Ballygowan  Castlereagh Street, Castlereagh Road.
A24  Belfast to Clough      Victoria Street from Ann Street to Cromac Street, Ormeau Road to City Boundary.
A500 From A6 to A2          York Street.
A501 From A6 to A2          Castle Place, High Street.

B23  Belfast to Lisburn     Gresham Street, Smithfield, King Street, College Square East, Gt. Victoria St. to Shaftesbury Sq., University Road, from Lisburn Road., Malone Road to City Boundary.
B38  Belfast to Glenavy     Howard Street, Grosvenor Road, Springfield Road to City Boundary.
B39  Belfast to Antrim      Upper North Street from Royal Avenue, Peter's Hill, Shankill Road, Woodvale Road, Crumlin Road to City Boundary.
B500 From A6 to B39         Crumlin Road, Clifton Street, Woodvale Road.
B501 From A6 to A2          Limestone Road
B502 From A6 to B503        Brookvale Avenue from Antrim Rd, to Brookhill Avenue, Brookhill Avenue, Cliftonville Road, Cliftonpark Avenue, Agnes Street, Northumberland Street, Albert Street.
B503 From Al to A6          Sandy Row, Durham Street, Townsend Street, Upper Townsend Street, Old Lodge Road from Upper Townsend Street and Denmark Street
B504 From B503 to A24       Donegall Road from Sandy Row to Shaftesbury Square, Donegall Pass.
B505 From A2 to A20         Mountpottinger Road, Beersbridge Road to Upper Newtowiiards Road.
B506 From A2 to A24         Short Strand, Ravenhill Road.

B roads that became A fairly quickly

B roads that became A later on

Listing by route number

note, descriptions are merging of the various authorities' ones.

Class I roads

Number Route Notes
A1 A1 Belfast (Donegall Sq N from East frontage of Donegall Place, Donegall Sq West, Bedford Street, Dublin Road, Bradbury Place, Lisburn Road to City Boundary) via Lisburn, Banbridge and Newry to Dundalk and Dublin. Also includes B23 Great Victoria Street. Bypasses have become unclassified (Wallace Avenue, Market Street, Smithfield Street etc, Lisburn) the B177 (Hillsborough), B2 (Dromore), A26 (Banbridge), A28 and A2 (Newry)
A2 Coast Road: Londonderry (Limavady Road, Bond's Hill, Duke Street, John Street, Foyle Street, Strand Road, Buncrana Road) via Belfast (Shore Road from City Boundary, York Road, Whitla Street, Garmoyle Street, Corporation Street, Victoria Street to Upper Ann St, Queen's Bridge, Bridge End, Newtownards Road, Holywood Road to City Boundary) and Bangor to Donaghadee; Clough via Newcastle and Kilkeel to Newry. B11 Donaghadee-Clough later converted to A2. Buncrana Road and Culmore Road now also A2; Duke Street-Clooney Road now A5. A2 northbound in Belfast diverted via A500. Bypasses have become B69 (Limavady-Ballycarton), B145 (Portballintrae), B146 (Giant's Causeway), B15 (Ballintoy), B505 (East Belfast), B198 (Holywood), unclassified (Old Belfast Road and Orlock), B20 (west Bangor) and B511 (Groomsport).
A3 A3 Belfast via Lisburn, Moira, Lurgan, Portadown and Armagh to Monaghan. Starts at Lisburn, considerable realignment around Craigavon and Portadown. Becomes N12. Later part of N54 Clones-Ballyhaise Road.
A4 Belfast via Portadown, Dungannon and Enniskillen to Manorhamilton and Sligo. Multiplexes with M1 between the Birches and Dungannon (former A4 is now A29 and A45.) Becomes N16.
A5 Londonderry (Victoria Road) via Strabane, Omagh, Aughnacloy to Monaghan and Dublin Bypassed sections now B72 (Strabane), B165 (Victoria Bridge), B84 (Newtownstewart), B48 (Omagh). Becomes N2.
A6 Belfast (Donegall Place, Royal Avenue, Upper Donegall Street, Clifton Street, Antrim Road to City Boundary) via Antrim, Toome Bridge, Maghera, Dungiven and Claudy to Londonderry (Spencer Road, Dungiven Road, Clooney Terrace). B74 bypassing Claudy was swapped with the A6. Former A6 through Toome is now B18, and through Castledawson is unclassified and A54.
A7 Belfast via Saintfield to Downpatrick. Largely unchanged.
A8 Belfast via Ballynure to Larne Former A8 in Glengormley is B56. Diverted via A6 and A8(M).
A20 A20 Belfast (Donegall Square South, May Street, Oxford Street from May Street to East Bridge Street, East Bridge Street, Albertbridge Road to Newtownards Road, Upper Newtownards Road to City Boundary) via Newtownards to Portaferry Diverted between Quarry Corner and Newtownards (former road is C264.) Diverted via new distributor in Newtownards. Old route presumed to be A21.
A21 Bangor via Newtownards and Saintfield to Ballynahinch. Partially diverted in Newtownards.
A22 Belfast via Comber and Killyleagh to Downpatrick. Former A22 through Comber is now A211.
A23 Belfast (Castlereagh Street, Castlereagh Road) to Ballygowan Largely unchanged.
A24 Belfast (Victoria Street from Ann Street to Cromac Street, Ormeau Road to City Boundary) via Ballynahinch to A25 at Clough . Largely uncharged.
A25 Strangford via Downpatrick, Castlewellan, Rathfriland, Newry and Newtownhamilton to Castleblayney Becomes R182.
A26 Banbridge via Lurgan, Antrim, Ballymena and Ballymoney to Coleraine Now includes former A1 through Banbridge. Diverted via B101 from Aldergrove to Antrim due to airport. Multiplexes with A3 between Lurgan and Moira, diverted via Ballee Link Road and Larne Road Link in Ballymena; old road in Ballymoney is B62.
A27 Newry via Tanderagee to Portadown Largely unchanged.
A28 Newry via Markethill, Armagh, Augher and A4 to Enniskillen Now includes spur to A1 at Newry.
A29 Portrush via Coleraine, Cookstown, Dungannon, Armagh and Keady to Dundalk. Diverted at Coleraine to form Ring Road. Becomes R177.
A30 Lisburn to Glenavy for Antrim Diverted in Lisburn.
A31 Moneymore (A29) Via Magherafelt and Castledawson to A6 Largely unchanged.
A32 Omagh, Trillick, and Enniskillen to Longford Includes two routes round Enniskillen. Multiplex with A4 at Enniskillen, becomes N87.
A33 Clones to Newtownbutler (connects A3 and A34). Possible route via unclassified road between Munilly Road and Clontrivin.
A34 Enniskillen via Lisnnskea and Newtownbutler to Cavan. Becomes R183 at Clones. Includes a spur at Maguiresbridge, then multiplex with A4.
A35 Enniskillen via Irvinestown, Kesh and Pettigo to Donegal Now only runs from Irvinestown to R232/R233 at Pettigo.
A36 Ballymena to Larne Largely unchanged, except Larne Road link in Ballymena is now A26
A37 Limavady to A29 for Coleraine Largely unchanged.
A37 Dundalk via Castleblayney to Londonderry first duplicate number in the whole UK - was there little communication? Also in the wrong part of the country for that number! Part of the N53.
A38 Strabane to Lifford Largely unchanged.
A39 Lisnaskea to Maguiresbridge (connects A34 and A4) Now a spur of the A34.
A500 Belfast: from A6 to A2 (York Street) Has lost its identity, being part of the A2 gyratory.
A501 Belfast: from A6 to A2 (Castle Place, High Street) Now extends via Divis Street, Falls Road and Glen Road to the A30 near Glenavy.

Class II Roads

Number Route Notes
B1 Downpatrick to Ardglass. Unchanged.
B2 Downpatrick via Dromore, Lurgan and Charlestown to Portadown. Suspected diversions around the M1/M12, terminates on A27, and also includes a separate spur road round the new town of Craigavon continuing towards Tandragee.
B3 Lurgan via Gilford, Tanderagee and Keady to Ballybay. Tanderagee was the traditional railway spelling. As well as the mainline which now multiplexes with the A51 between Gilford and Tandragee and continues to the R214 at the border near Castleshane (via the former B33)k, a spur runs from Gilford to Scarva, Loughbrickland, and Rathfriland.
B4 Cookstown via Pomeroy, Omagh and Lack to Kesh. Starts in Cookstown as A505, multiplexing in Omagh as B158, then A32 before diverging.
B5 Greyabbey to Ballywalter. Unchanged.
B6 Lisburn to Saintfield. A49 between Lisburn and diverging point. Now continues to Killyleagh.
B7 Killyleagh via Crossgar, Ballynahinch and Dromara to Rathfriland. Now starts on B6. Multiplexes with B2 at Ballynahinch and continues from Rathfriland to Warrenpoint.
B8 Newry via Hilltown to A25. Now continues to A25 near Kilcoo.
B9 Donaghcloney Road from A26 to B2. Unchanged.
B10 Banbridge via Scarva to A27. Now continues to Rathfriland.
B11 Donaghadee via Ballywalter, Portaferry to Clough at A2. links the two sections of A2; later became the A2.
B12 Glenavy to Moira. Unchanged.
B13 Belfast to Crumlin. became A52, otherwise unchanged. Ends on B12.
B14 Cushendall to Parkmore on B61. Unchanged.
B15 Armoy to Ballycastle (Glenshesk Road). Now extended at either end: from Armoy to B62 near Ballymoney, and along what would then have been the A2 coast road via Ballintoy.
B16 Ballymoney via Carnageeragh to B63. Unchanged. B63 is now A44.
B17 Bushmills to Coleraine. Now extended from Bushmills via Straid to the current A2.
B18 Ballymena to Toome. Now extended via Ballyronan to Moneymore. Includes spur at Toome (former A6)
B19 Ballymena via Portglenone to Maghera (A6) became part of A42
B20 Crawfordsburn, Shore Road. Includes a few spurs (former A2) in Bangor.
B21 Bangor to Donaghadee. Unchanged.
B22 Newtownards to Donaghadee became A48, otherwise unchanged apart from realignments.
B23 Belfast (Gresham Street, Smithfield, King Street, College Square East, Gt. Victoria St. to Shaftesbury Sq., University Road, from Lisburn Road., Malone Road to City Boundary) to Lisburn. Gresham Street/Smithfield/King Street declassified. Now multiplexes with B503 to College Square North, A1 from College Square East to Bradbury Place, and A55 from Balmoral Avenue to Ballylesson Road.
B24 Lisburn to Ballynahinch. became A49
B25 Dromore (Al) via Rathfriland to Rostrevor. Unchanged. Partly multiplexes with A50.
B26 Newcastle via Castlewellan to Banbridge. became A50.
B27 Newry (B8) via Hilltown and Kilkeel to Greencastle. Starts at Hilltown, ends at Kilkeel harbour. Kilkeel-Greencastle is unclassified.
B28 Banbridge via Gilford and Portadown to Moy. Became A50 to Portadown.
B29 Armagh to Tanderagee. Became A51
B30 Newry via A25, Crossmaglen, Cullaville to Carrickmacross. Continues on R179. Extended by 1 mile to join present A25 at two points along bypassed section of A25
B31 Armagh via A29 to Newtownhamilton. Unchanged.
B32 Keady to Castleblayney. Starts on the B3 and continues as R181.
B33 Keady via B3 to Monaghan. Now entirely B3.
B34 Cookstown via Dungannon to A4 for Portadown. Now runs from Dungannon to B106 at Tamnamore only (A4 multiplexes with M1)
B35 Dungannon via Aughnacloy to Monaghan A45 Dungannon-Granville, then A5 Aughnacloy-the border.
B36 From A34 at Donagh via Rosslea to Monaghan. Unchanged, continues as R187.
B37 Ballyshannon along South side of Lough Erne, through Enniskillen to Belturbet. Became A46/A509. Connects two parts of the N3.
B38 Belfast (Howard Street, Grosvenor Road, Springfield Road to City Boundary) to Glenavy Unchanged.
B39 Belfast (Upper North Street from Royal Avenue, Peter's Hill, Shankill Road, Woodvale Road, Crumlin Road to City Boundary) via Ligoniel to Antrim. Multiplexes with B13, and now diverted altogether via A52 (former B13) between Ballysillan Road and Seven Mile Straight - Ligoniel Road and Ballyutoag Hill are now declassified. Now ends on A26 Oldstone Road (former B101.)
B40 Magherafelt via Draperstown and Feeny to A6. Multiplexes with A29 at Desertmartin, and ends on the former A6 (now B74) near Claudy. Unchanged.
B41 Tobermore to Draperstown. Unchanged.
B42 Tobermore to A6 at Ranaghan Bridge. Unchanged.
B43 Dungannon via Pomeroy to A4. Ends on B4 at Pomeroy.
B44 A6 via Learmount to Claudy. Runs from former A6 near Feeny to Park, now declassified from Park to Claudy via Learmount.
B45 Dungannon via Caledon to Monaghan. Unclear if section from Caledon to Border (R185) has been declassified.
B46 Newtownstewart via B47 to Gortin. Now continues to Carrickmore.
B47 Newtownstewart to Plumbridge. Now continues to Draperstown.
B48 Londonderry via A5 and Dunnamanagh to Omagh. Starts at Newbuildings. Now includes former A5 into Omagh.
B49 Strabane via A5 and Dunnamanagh to Claudy. Includes a spur to Ballymagorry (former A5?)
B50 Omagh via Drumquin and Castlederg to Castlefinn. Unclassified between Castlederg and R235.
B52 Belleek via Garrison, and Belcoo to A4. Unchanged.
B52 Randalstown to Portglenone. Ends on what is now the A42.
B53 Randalstown to B59. Now extended to A36 at Moorfields.
B53 Garrison to Manorhamilton. Becomes R282.
B55 Kerr Street, Portrush. Now declassified.
B56 A8 at Ballyhenry to B57. Now extended via former A8 to A6 at Glengormley.
B57 Ballynure to Templepatrick. became A57.
B58 Ballynure to Carrickfergus. Unchanged.
B59 Belfast (B56) to Ballymena (A36) via Doagh Now extended via Mossley to Shore Road A2 near Rushpark.
B60 Ballymena to Carnlough. became part of A42
B61 Ballymena to Glenariff. became A43
B62 Ballymena via Ballymoney to Portrush. Unchanged, apart from spur at Ballymoney (former A26)
B63 Ballymena (A26)to Ballycastle. became A44.
B64 Ballymena via B62 and Kilrea to Dungiven via B70 Now commences at A43 near Newtoncrommelin, via Clogh to B93 at Glarryford, and B62 at Rasharkin.
B65 Coleraine via A29, Kilrea, and Portglenone to A6 at Castledawson. became A54
B66 Limavady via A37, Agivey Bridge, Ballymoney to Bushmills Unchanged.
B67 Ballycastle to Coleraine Unchanged.
B68 Limavady to Dungiven. Unchanged.
B69 Limavady to Claudy. Now extended to A2 at Glebe (possibly former A2)
B70 B62 via Kilrea to Limavady, B66 at Ringsead to Garvagh B62 to B64 near Kilrea, then multiplexes with B64 to Garvagh, then to Ringsend and multiplex with B66 to Limavady
B71 Londonderry (Letterkenny Road, Foyle Road) to Letterkenny. Became A40 to Nixon's Corner, B193 towards Letterkenny, continuing as R237.
B72 Strabane via A5, Victoria Bridge, Castlederg, Pettigo, and Belleek to Bundoran. Avoids Pettigo, going via a multiplex with B4 at Ederney to end on the B82 at Castle Archdale near Lisnarick. A possible planned route is via Scraghy Road (unclassified), eventually reaching the R233 at Pettigo, which reaches Belleek via the B136 and A47.
B73 Cookstown via Coagh to Newport Trench. Ends at Lough Neagh near Moortown.
B74 Foreglen Road. connecting A6 near Burntollct with A6 near Dungiven. Later exchanged with A6 Glenshane Road via Claudy
B75 A29 at Grillagh Bridge to Kilrea. Unchanged.
B76 Lurgan to Kinnegoe. Became A76 between Lurgan and the M1 after the M1 was built. Ends on the B2 at Derrymacash.
B77 Portadown via Loughgall to Armagh. Unchanged.
B78 Portadown via A27 to Markethill. Now extended to Newtownhamilton.
B79 Newry to Carlingford. Becomes R173.
B80 Enniskillen to Tempo. Now extends to Fintona.
B81 Enniskillen (from B37) to Derrygonnelly. Now starts from the A46 at Silverhill, with a long spur to the A4 at Drumgallan. Continues to A46 at Binmore.
B82 Enniskillen (from A32) via Trory to Kesh. Starts at Trory, joins A35 at Drumwhinny.
B83 Omagh via A5 and Clogher to Monaghan. Starts at Doogary, includes a spur to Clogher, and continues as R186.
B84 Newtownstewart via Drumquin to Dromore. Now includes former A5 at Newtownstewart. Multiplexes with B50 at Drumquin and ends on the B46 at Dromore.
B85 Strabane via Clady to Castlefinn. Unclassified between the border and the N15.
B86 Dervock (B66) to B67. Unchanged.
B500 Belfast: from A6 to B39 (Crumlin Road, Clifton Street, Woodvale Road) Subsumed by A52.
B501 Belfast: from A6 to A2 (Limestone Road) Now extended to North Circular Road.
B502 Belfast: from A6 to B503 (Brookvale Avenue from Antrim Rd, to Brookhill Avenue, Brookhill Avenue, Cliftonville Road, Cliftonpark Avenue, Agnes Street, Northumberland Street, Albert Street) Substantial diversions - of the original route, it only runs from Northumberland Road to Agnes Street, and now continues via Oldpark Road to Ballysillan Road. All other parts declassified.
B503 Belfast: from Al to A6 (Sandy Row, Durham Street, Townsend Street, Upper Townsend Street, Old Lodge Road from Upper Townsend Street and Denmark Street) Now diverted via College Square North and Millfield to Clifton Street, omitting Townsend Street, and then continuing via North Queen Street to A2 York Road.
B504 Belfast: from B503 to A24 (Donegall Road from Sandy Row to Shaftesbury Square, Donegall Pass) Now declassified.
B505 Belfast: from A2 to A20 (Mountpottinger Road, Beersbridge Road to Upper Newtownards Road) Mountpottinger Road and Castlereagh Street now A23. Extended via Holywood Road (former A2) to Parkway (A55)
B506 Belfast: from A2 to A24 (Short Strand, Ravenhill Road) Broadly unchanged.
B507 Londonderry: from A2 to B71 (Lone Moor Road, Upper Road, Northland Road, Rock Road) Lone Moor Road is now B524. B507 now starts at Abercorn Road (former B508) and runs via Duncreggan Road to Strand Road (A40, former A2)
B508 Londonderry (Abercorn Road, Bishop Street Without) Abercorn Road now B507. Bishop Street Without now declassified.

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