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In the Great Britain road numbering scheme, Great Britain is divided into numbered zones, the boundaries of which are usually defined by single-digit roads. The first digit of a road's number should be the number of the zone it occupies. If the road occupies multiple zones, then the furthest-anticlockwise zone is the correct one. Great Britain has many ancient roads and trackways dating back not only to the Roman occupation of southern Britain but to much earlier times, including the oldest engineered road to be discovered anywhere in the world: the Sweet Track dating from the 3800s BC. With the advent of the motor...
The following table lists all British roads which are anomalously numbered. Roads in bold are not found at all within their 'correct' zone, while roads not in bold do exist in their 'correct' zones but trespass into zones anticlockwise of this zone.
Motorways While the M25 may appear to contradict these rules as it runs through all the London-bound zones, it in fact does not; it does not run in a complete circle, starting in Zone 2, and proceeding clockwise through zones 3, 4 and 1. The A282, which completes the circle mostly formed by the M25, is incorrectly numbered; it proceeds into the A-road 1-zone incorrectly. The United Kingdoms M48 motorway is a small motorway that includes the original Severn Bridge. ...
Gloucestershire (pronounced ; GLOSS-ter-sher) is a county in southwest England. ...
Monmouthshire (Welsh: Sir Fynwy) is both a principal area and a traditional county in south-east Wales. ...
The M4 motorway is a motorway in the UK, which links London and west Wales via Bristol. ...
The M49 motorway is a small motorway west of Bristol, England, that forms a shortcut between the M5 motorway and the Second Severn Bridge on the M4 motorway. ...
Bristol is an English city and county and one of the three administrative centres of South West England (the others being Plymouth and Exeter). ...
The M62 motorway connects the cities of Liverpool and Hull, in England. ...
Merseyside is a metropolitan county, located in the North West of England. ...
Greater Manchester is a metropolitan county in England established in 1974 which covers an area roughly encompassing the conurbation surrounding the City of Manchester. ...
The M65 motorway is a major road in England. ...
Lancashire is a county of England, lying on the Irish Sea. ...
The M271 is a short motorway in southern England, near the city of Southampton. ...
Hampshire (abbr. ...
The M27 motorway is a major road in England. ...
The M25 motorway looking south between junctions 14 and 15, near Heathrow Airport. ...
A roads | Road Number | Location | Trespassed zone(s)
| Reason/Excuse for this | | A14 | Northamptonshire | Zone 5 & 6 | The A14 was chosen as a unique, important number for this crucial cross-country route. | | A31 | Surrey | Zone 2 | A section of the A31 through Guildford was bypassed east by the A3. | | A42 | Leicestershire | Zone 5 | The A42 is numbered as an extension of the M42. | | A51 | Warwickshire | Zone 4 | | | A55 | Anglesey | Zone 4 | The A55 supersedes the A5 through Angelsey. | | A66 | Cumbria | Zone 5 | The A66 was extended westwards beyond the A6 to make it a cross-country route. | | A88 | Falkirk | Zone 9 | Planned to extend westwards to form the A80 to Kincardine Bridge road - this instead became the M876. | | A89 | Glasgow | Zone 7 | The A89 through Glasgow was partly formerly the A8. | | A167 | Durham | Zone 6 | The A167 through Durham was formerly part of the A1. | | A168 | North Yorkshire | Zone 6 | The A168 was formerly part of the A1. | | A177 | Durham | Zone 6 | The A1 was moved east of its start-point in Durham City. | | A181 | Durham | Zone 6 | The A1 was moved east of its start-point in Durham City. | | A199 | East Lothian | Zone 6 | The A199 was formerly part of the A1. | | A282 | Thurrock | Zone 1 | See above for explanation involving the M25. | | A307 | Surrey | Zone 2 | The A307 was formerly part of the A3. | | A320 | Surrey | Zone 2 | As A307. | | A322 | Surrey | Zone 2 | As A307. | | A397 | Portsmouth | Zone 2 | The A397 was formerly part of the A3. | | A404 | Windsor and Maidenhead | Zone 3 | The A404 was formerly part of the A4. | | A412 | Slough | Zone 3 | | | A427 | Northamptonshire | Zone 6 | The A427 was truncated and most of it renumbered as the A14. | | A505 | Bedfordshire | Zone 4 | The A505 was extended to become a cross-country route. | | A601 | Derby | Zone 5 | Chosen as a unique number for the Derby inner ring road. | | A620 | Nottinghamshire | Zone 1 | The A620 was truncated and left east of the A1. | | A624 | Derbyshire | Zone 5 | The A624 was formerly part of the A6. | | A683 | Lancashire | Zone 5 | The A683 was extended westwards to Heysham docks. | | A720 | Edinburgh | Zone 6 | The A720 bypasses Edinburgh, a numbering hub, making numbering difficult; A720 was chosen for apparent importance. Most important 6-zone numbers were all used. | | A882 | Highland | Zone 9 | The A882 was formerly part of the A9. | | A899 | West Lothian | Zone 7 | The A899 was extended south through Livingston new town. | | A949 | Highland | Zone 8 | The A949 was formerly part of the A9. | | A1000 | Hertfordshire | Zone 6 | The A1000 was formerly part of the A1. | | A1057 | Hertfordshire | Zone 6 | As A1000. | | A1068 | Northumberland | Zone 6 | The A1068 was formerly part of the A1. | | A1081 | Hertfordshire | Zone 6 | The A1081 was formerly part of the A6. | | A1246 | Northumberland | Zone 6 | The A1246 was formerly part of the A1. | | A3023 | Hampshire | Zone 2 | | | A3100 | Surrey | Zone 2 | The A3100 was formerly part of the A3 (and the A31). | | A3400 | Warwickshire | Zone 4 | The A3400 was formerly part of the A34. | | A4174 | Bristol | Zone 3 | The A4174 is part of the Bristol outer ring road. | | A4208 | London | Zone 3 | Truncation of the A4 left the A4208 out-of-zone. | | A4300 | Northamptonshire | Zone 5 | The A4300 was formerly part of the A43. | | A4303 | Leicestershire | Zone 5 | The A4303 was formerly part of the A427. | | A4304 | Leicestershire | Zone 5 | As A4303. | | A4500 | Northamptonshire | Zone 5 | The A4500 was formerly part of the A45. | | A4501 | Northamptonshire | Zone 5 | As A4500. | | A4601 | Staffordshire | Zone 5 | The A4601 was formerly part of the A460. | | A5127 | Staffordshire | Zone 4 | The A5127 was extended south when the A38 bypassed Lichfield. | | A5140 | Bedfordshire | Zone 4 | | | A5153 | Anglesey | Zone 4 | The more-important A55, rather than the A5, is taken to be zone boundary. | | A5154 | Anglesey | Zone 4 | The more-important A55, rather than the A5, is taken to be zone boundary. | | A5223 | Telford | Zone 4 | | | A6004 | Leicestershire | Zone 5 | The A6004 was formerly part of the A6. | | A6010 | Manchester | Zone 5 | The A6010 is part of the Manchester ring road. | | A6143 | Manchester | Zone 5 | | | A6144 | Trafford | Zone 5 | | | A6182 | Doncaster | Zone 1 | The A1 was rerouted leaving the A6182 out-of-zone. | | A8000 | Edinburgh | Zone 9 | The A8000 was truncated with the building of the M9 spur halfway to the Forth Road Bridge. | The A14 is a major road in England, running from The Port of Felixstowe to the junction of the M1 and M6 motorways near Rugby. ...
Northamptonshire (abbreviated Northants or Nhants) is a landlocked county in central England with a population of 629,676 (2001 census). ...
The A31 is a major trunk road in England running south west from Guildford in Surrey along the Hogs Back. ...
Surrey is a county in southern England, part of the South East England region and one of the Home Counties. ...
The A3 near Liphook The A3 is a trunk road in Southern England, connecting London to Portsmouth. ...
The A42 is a major dual carriageway trunk road linking the M1 motorway at Nottingham East Midlands Airport in north Leicestershire to junction 11 of the M42 motorway. ...
Leicestershire (abbreviated Leics) is a landlocked county in central England. ...
The M42 motorway is a major road in England. ...
The A51 road is a road in England linking Kingsbury in Warwickshire (just east of Birmingham), with Chester in Cheshire. ...
Warwickshire (pronounced either /ˈwÉ”Ëɹɪkˌʃə/ or /ˈwÉ”Ëɹɪkˌʃɪə/) is a landlocked non-metropolitan county in central England. ...
The A55 at Warren Mountain The A55, also known as the North Wales Expressway, is a major road in Britain. ...
Anglesey (Welsh: Ynys Môn, pronounced (IPA), roughly unniss mawn), is an island and county at the north western extremity of north Wales. ...
Marble Arch - the start of the A5 road The A5 is a major road in the United Kingdom. ...
The A66 is a major road in England. ...
Cumbria is a administrative county located in the northwest area of England. ...
This article is about the A6 road in England. ...
Falkirks location in Scotland Falkirk (An Eaglais Bhreac in Scottish Gaelic) is a town in Scotland, in the district of Falkirk. ...
The A80 is a trunk road in Scotland, linking Glasgow to Stirling. ...
The Kincardine Bridge is a road bridge crossing the River Forth near Kincardine, Scotland. ...
The M876 motorway is a motorway in Scotland. ...
Glasgow (or Glaschu in Gaelic) is Scotlands largest city and unitary council, situated on the River Clyde in the countrys west central lowlands. ...
The A8 is a major road in Scotland, connecting Edinburgh to Greenock via Glasgow. ...
The A167 is a road in North East England. ...
Durham (IPA: locally, in RP) is a small city in the north east of England. ...
Also known as the Great North Road. ...
North Yorkshire is a county within the region of Yorkshire and the Humber in England. ...
Also known as the Great North Road. ...
Durham (IPA: locally, in RP) is a small city in the north east of England. ...
Durham (IPA: locally, in RP) is a small city in the north east of England. ...
East Lothian (Lodainn an Ear in Gaelic) is one of 32 unitary council areas in Scotland, and a Lieutenancy Area. ...
Thurrock is a unitary authority in England. ...
Surrey is a county in southern England, part of the South East England region and one of the Home Counties. ...
Surrey is a county in southern England, part of the South East England region and one of the Home Counties. ...
Surrey is a county in southern England, part of the South East England region and one of the Home Counties. ...
This article is about the English city of Portsmouth. ...
The Royal Borough of Windsor and Maidenhead is a unitary authority in Berkshire, South East England. ...
Slough (pronounced ) is a town and unitary authority in the county of Berkshire in the south of England. ...
Northamptonshire (abbreviated Northants or Nhants) is a landlocked county in central England with a population of 629,676 (2001 census). ...
Bedfordshire is a county in England. ...
Derby (pronounced dar-bee ) is a city in the East Midlands of England. ...
A beltway (American English), ring road or orbital motorway (British English) is a circumferential highway found around many cities. ...
Nottinghamshire (abbreviated Notts) is an English county in the East Midlands, which borders South Yorkshire, Lincolnshire, Leicestershire and Derbyshire. ...
Derbyshire (pronounced Dar-bee-shur) is a county in the East Midlands of England, which boasts some of Englands most attractive scenery. ...
Lancashire is a county of England, lying on the Irish Sea. ...
Stone graves overlooking Morecambe Bay, with the mountains of the Lake District in the distance Heysham (pronounced hee-sham) is a small, coastal village near Lancaster in the county of Lancashire in England. ...
Overview The A720 or Edinburgh City Bypass is one of the most important trunk roads in Scotland. ...
Edinburghs location in Scotland Edinburgh viewed from Arthurs Seat. ...
Highland (a Ghaidhealtachd in Gaelic) is the name of the largest administrative region in Scotland. ...
The A9 north of Brora The A9 is a major road running from the Falkirk area in the south of Scotland to Thurso in the far north, via Stirling, Bridge of Allan, Perth and Inverness. ...
West Lothian or Linlithgowshire (Lodainn an Iar in Gaelic) is one of 32 unitary council regions in Scotland, and a Lieutenancy area. ...
Livingston is a name shared by various towns and places: Livingston, Scotland, United Kingdom Livingston, Guatemala, port town in Izabal province of Guatemala And many in the United States of America: Livingston, Alabama Livingston, California Livingston, Illinois Livingston, Kentucky Livingston, Louisiana Livingston, Montana Livingston, New Jersey Livingston, New York Livingston...
A New town or planned community or planned city is a city, town, or community that was designed from scratch, and grew up more or less following the plan. ...
Highland (a Ghaidhealtachd in Gaelic) is the name of the largest administrative region in Scotland. ...
Hertfordshire (pronounced Hartfordshire and abbreviated as Herts) is an inland county in the United Kingdom, officially part of the East of England Government region. ...
Hertfordshire (pronounced Hartfordshire and abbreviated as Herts) is an inland county in the United Kingdom, officially part of the East of England Government region. ...
For other places with this name, see Northumberland (disambiguation) Northumberland is a traditional, ceremonial and administrative county in northern England. ...
Hertfordshire (pronounced Hartfordshire and abbreviated as Herts) is an inland county in the United Kingdom, officially part of the East of England Government region. ...
For other places with this name, see Northumberland (disambiguation) Northumberland is a traditional, ceremonial and administrative county in northern England. ...
Hampshire (abbr. ...
Surrey is a county in southern England, part of the South East England region and one of the Home Counties. ...
Warwickshire (pronounced either /ˈwÉ”Ëɹɪkˌʃə/ or /ˈwÉ”Ëɹɪkˌʃɪə/) is a landlocked non-metropolitan county in central England. ...
Bristol is an English city and county and one of the three administrative centres of South West England (the others being Plymouth and Exeter). ...
The Houses of Parliament and Big Ben London and the Regions of England London is the most populous city in the European Union, with an estimated population on 1 January 2005 of 7,421,328 and a metropolitan area population of approximately 13,945,000 [1]. Londons population includes...
Northamptonshire (abbreviated Northants or Nhants) is a landlocked county in central England with a population of 629,676 (2001 census). ...
Leicestershire (abbreviated Leics) is a landlocked county in central England. ...
Leicestershire (abbreviated Leics) is a landlocked county in central England. ...
Northamptonshire (abbreviated Northants or Nhants) is a landlocked county in central England with a population of 629,676 (2001 census). ...
Northamptonshire (abbreviated Northants or Nhants) is a landlocked county in central England with a population of 629,676 (2001 census). ...
Staffordshire (abbreviated Staffs) is a landlocked county in the West Midlands region of England. ...
Staffordshire (abbreviated Staffs) is a landlocked county in the West Midlands region of England. ...
Lichfield Cathedral June 2005 Lichfield is a small city in Staffordshire, 110 miles northwest of London and 14 miles north of Birmingham. ...
Bedfordshire is a county in England. ...
Anglesey (Welsh: Ynys Môn, pronounced (IPA), roughly unniss mawn), is an island and county at the north western extremity of north Wales. ...
The A55 at Warren Mountain The A55, also known as the North Wales Expressway, is a major road in Britain. ...
Anglesey (Welsh: Ynys Môn, pronounced (IPA), roughly unniss mawn), is an island and county at the north western extremity of north Wales. ...
Map sources for Telford at grid reference SJ6909 Telford is a planned town in Shropshire, England, that was named after the engineer Thomas Telford. ...
Leicestershire (abbreviated Leics) is a landlocked county in central England. ...
Manchester is a city in the North West of England. ...
Manchester is a city in the North West of England. ...
Image of Trafford Town Hall Trafford is a metropolitan borough in Greater Manchester, England. ...
The A6182 (also known as White Rose Way) is a section of dual carriageway that runs north from junction 3 of the M18, finishing roughly two miles away in Doncaster town centre. ...
Map sources for Doncaster at grid reference SE5702 Doncaster is a town in South Yorkshire, (and in the former West Riding of Yorkshire), England which has been recognised nationally as an emerging regional city . ...
Edinburghs location in Scotland Edinburgh viewed from Arthurs Seat. ...
The M9 motorway is a major motorway in Scotland. ...
Forth Road Bridge Forth Road Bridge Forth Road Bridge, northbound The Forth Road Bridge is a road suspension bridge over the Firth of Forth in the east of Scotland, to the west of the Forth Bridge. ...
B roads | Road Number | Location | Trespassed zone(s)
| Reason/Excuse for this | | B197 | Hertfordshire | Zone 6 | The B197 was formerly part of the A1 | | B316 | London | Zone 4 | A4 rerouted | | B325 | London | Zone 4 | A4 rerouted | | B455 | London | Zone 3 | | | B470 | Windsor and Maidenhead | Zone 3 | | | B576 | Northamptonshire | Zone 6 | A6 rerouted | | B645 | Northamptonshire | Zone 5 | A6 rerouted | | B855 | Highland | Zone 9 | The A9 was rerouted west of this road, to end at Thurso. | | B876 | Highland | Zone 9 | The A9 was rerouted west of this road, to end at Thurso. | | B1043 | Cambridgeshire | Zone 6 | The B1043 was formerly part of the A1. | | B1164 | Nottinghamshire | Zone 6 | The B1164 was formerly part of the A1. | | B1217 | Leeds | Zone 6 | extended along old A642 when M1 extended | | B1224 | North Yorkshire | Zone 6 | The A1 was re-routed, leaving its start-point out of zone. | | B1284 | Durham | Zone 6 | The A1 was re-routed, leaving its start-point out of zone. | | B3000 | Surrey | Zone 2 | A3 rerouted | | B3004 | Hampshire | Zone 2 | | | B3006 | Hampshire | Zone 2 | | | B4640 | West Berkshire | Zone 3 | | | B4666 | Hinckley, Leicestershire | Zone 5 | The B4666 was formerly part of the A47. | | B4667 | Hinckley, Leicestershire | Zone 5 | The B4667 was formerly part of the A447. | | B4668 | Hinckley, Leicestershire | Zone 5 | The B4668 was formerly part of the A47. | | B4669 | Leicestershire | Zone 5 | | | B5060 | Telford | Zone 4 | | | B5061 | Shropshire | Zone 4 | | | B5070 | Wrexham | Zone 4 | The B5070 was formerly part of the A5. | | B5072 | Telford | Zone 4 | | | B5444 | Swansea | Zone 4 | | | B6280 | Darlington | Zone 1 | The A1 was re-routed, leaving its start-point out of zone. | | B6291 | Durham | Zone 1 | The section within Zone 6 was renumbered as the A688. | | B6420 | Nottinghamshire | Zone 1 | The A1 was re-routed, leaving its start-point out of zone. | | B6469 | Manchester | Zone 5 | | | B6541 | Middlesborough | Zone 1 | The B6541 was formerly part of the A66. | | B9080 | West Lothian | Zone 8 | The B9080 was formerly part of the A9. | | B9150 | Highland | Zone 8 | The B9150 was formerly part of the A9. | | B9163 | Highland | Zone 8 | A9 rerouted | | B9164 | Highland | Zone 8 | A9 rerouted | | B9169 | Highland | Zone 8 | A9 rerouted | | B9176 | Highland | Zone 8 | The B9176 was formerly part of the A9 | | B9177 | Highland | Zone 8 | The B9177 was formerly part of the A9 |
Irregularities not based on the zoning system | Road Number | Location | Reason for irregularity | | A594 | one in Cumbria, one in Leicester | There are two A594s which are clearly separate roads. | | A601(M) | Carnforth, Lancashire | "A601(M)" would be a designation for an upgraded section of the A601. The A601 is a completely different road in Derby. | Curiously there are two stretches of road in England designated the A594 the first leads from Maryport in Cumbria to Cockermouth. ...
Cumbria is a administrative county located in the northwest area of England. ...
Leicester (pronounced ) is a city in the English East Midlands, on the River Soar. ...
The A601(M) is a two-way spur of the M6 in Lancashire. ...
Carnforth is a small town in the north of Lancashire, England, situated at the north-east end of Morecambe Bay, by the River Keer. ...
Lancashire is a county of England, lying on the Irish Sea. ...
Derby (pronounced dar-bee ) is a city in the East Midlands of England. ...
Links - Out-of-Zone Roads (where most of the info on this page is taken from)
- SABRE : The Society for All British Road Enthusiasts
- Chris' British Road Directory (CBRD): The UK's Leading road fansite :-)
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