The A1 is the longest numbered road in the UK at long. It connects London, the capital city of the United Kingdom and of England, with Edinburgh, the capital of Scotland. For much of its path it follows the historic Great North Road. The modern course of the A1 diverges somewhat, particularly where it passed through a town or village that has subsequently been bypassed, or where new motorway standard road has been constructed on a more direct route. Between its junctions with the M25 (near London) and A696 (near Newcastle upon Tyne) the road forms part of the unsigned Euroroute E15 which runs from Inverness to Algeciras.
The A1 shares its London terminus with the A40, in the City area of Central London. It then runs out of London through Islington (where Upper Street forms part of its route), up Holloway Road, through Barnet, Potters Bar, Hatfield, Welwyn, Stevenage, Baldock, Biggleswade, Sandy, St Neots and Peterborough. Continuing north, the A1 runs on modern bypasses around Stamford, Grantham, Newark-on-Trent, Retford, Bawtry, Doncaster, Knottingley, Garforth, Wetherby, Knaresborough, Boroughbridge, Scotch Corner, Darlington, Newton Aycliffe, Durham, Chester-le-Street, past the Angel of the North sculpture and the Metrocentre in Gateshead, around Newcastle upon Tyne, Morpeth, Alnwick, Berwick-upon-Tweed, into Scotland, past Dunbar, Haddington and Musselburgh before finally arriving in Edinburgh at the East End of Princes Street near Waverley Station at the junction of the A7, A8 and A900 roads.
The Great North Road, in part, followed the course of the Roman Ermine Street: from Alconbury as far as Colsterworth (at the A151 junction), and again in the North Nottinghamshire and Yorkshire areas - utilising part of the course of the Roman Rigg or Roman Ridge north of Doncaster. Further north the Great North Road utilised the Roman Dere Street to Boroughbridge from where it went to Northallerton and then up through Darlington and Durham. An older and alternative route to the north from London was the Old North Road. This followed the initial section of Ermine Street and joined the Great North Road at Alconbury where a prominent milestone records the respective mileages from London on both routes: 65 miles on the Old North Road and 68 by the Great North Road.
A traditional starting point of the Great North Road was the now demolished Hicks Hall at Smithfield in Central London. Milestones and distances in road atlases were measured from this point.The route ran from Smithfield up St John Street to the Angel Islington. However, with the building of the General Post Office at St Martin's-le-Grand in 1829, coaches started using the alternative route used by the modern A1, beginning at the GPO building and following Aldersgate Street and Goswell Road before joining the old route at the Angel. The Angel was originally an inn and an important staging post on the route.
The Great North Road is often mentioned in English literature, for example Pickwick Papers by Charles Dickens.
The legendary highwayman Dick Turpin's rapid flight from London to York, in less than 15 hours, on his faithful mare Black Bess, is perhaps the most famous legend of the Great North Road. Various inns that still stand along the A1 claim that Turpin ate his lunch there that night, or stopped off there for a brief respite for his horse. Harrison Ainsworth, in his famous 1834 romance Rookwood, immortalised this with a spirited account of this wonderful ride by Dick Turpin on his mare, and it is in this connection that Turpin's name has been generally remembered. Historians have frequently argued that Turpin never actually made this speedy journey, and that, as far as Turpin is concerned, the incident is pure fiction. They argue that such a ride was really made by John Nevison, known as "Swift Nick", born and raised at Wortley village near Sheffield and a well-known highwayman in the time of Charles II some 50 years before Turpin, who to establish an alibi rode from Gad's Hill (near Rochester, Kent) to York (some ) in about 15 hours.
Even more unreliable evidence links various highwaymen with the Ram-Jam Inn at Stretton, in Rutland. The A1 passes a few feet from the door. Although the interior of the historic inn was lost to fire in the 1970s, a modern restaurant occupies the building now.
The original Great North Road had a number of Historic Coaching Inns, including the George at Stamford and the Bell Inn at Stilton (hence Stilton cheese, which was first sold from the Inn from about 1730).
Scotch Corner, in North Yorkshire, marks the point where the traffic for Glasgow and the west of Scotland divides from that for Edinburgh, as it has for hundreds of years before motor traffic. As well as a historic hotel there have been a variety of homes for the famous transport café, now subsumed as a motorway services.
The road skirts the remains of Sherwood Forest, and passes the historic Catterick Garrison.
The original A1 route was designated by the Ministry of Transport in 1921
The route was modified in 1927 when bypasses were built around Barnet and Hatfield
In 1960 Stamford and Doncaster were bypassed, as was Retford in 1961 and St Neots in 1971.
During the early 1970s immediate plans to widen the A1 along the Archway Road were abandoned after four public inquiries when, for the first time, road protesters disrupted the process rather than relying on giving evidence in an orderly manner. The scheme was finally dropped in 1990.
During the 1980s the Hatfield section was rebuilt in a tunnel.
Recent re-routing required the moving of the memorial at Norman Cross to the Napoleonic prisoners buried there.
Speed cameras have been introduced on the busy single carriageway section north of Morpeth which is notorious stretch dangerous overtaking and where there is heavy tourist traffic to locations like Alnwick Castle and heavy goods vehicles serving Scotland. Most of the approaches to the roundabouts between Blyth and London have speed cameras, GATSO or TruVelo about a mile before the roundabout, so that people are doing no more than 70 when the signs announcing the junctions are visible. These are being retained or at the most relocated and recalibrated to control speeds through the roadworks as the roundabouts are bypassed.
| Blyth (A614) | Fully operational May 2008 |
| Apleyhead (A614/A57) | Fully operational January 2008 |
| Markham Moor (A57) | Completion date November 2008 |
| Gonerby Moor (B1174) | Fully operational March 2008 |
| Colsterworth (A151) and the junction with the B6403 | Completion date June 2009 |
| Carpenters Lodge (Stamford) (B1081) | Completion date November 2008 |
Plans to improve the single carriageway section of road north of Newcastle upon Tyne were shelved in 2006 as they were not considered a regional priority. The intention was to dual the road between Morpeth and Felton and between Adderstone and Belford. There are now no current plans to dual the whole of the A1 route between Newcastle and Edinburgh, despite fierce campaigns in the past to make this so.
Improvements to junctions near the village of Elkesley, Nottinghamshire are planned; since the 1990s this has been the only location between London and Newcastle where there is a permanent speed restriction below national speed limit, as the village's only access to the rest of the road network is via the A1.
Further sections of motorway upgrades are planned, which would ultimately create a single motorway running from Doncaster to Gateshead.
Some sections of the A1 have been upgraded to motorway standard. These are known as the A1(M). These include:
This section opened in stages:
| A1(M) Motorway | ||
| Northbound exits | Junction | Southbound exits |
| Road continues as A1 to Sandy | J10 Baldock services | Stotfold, Henlow A507 Non-motorway traffic |
| Stotfold, Henlow A507 | Start of Motorway | |
| Letchworth, Baldock A505 | J9 | Letchworth, Baldock, Hitchin A505 |
| Hitchin, Stevenage A602 | J8 | Stevenage A602 |
| Stevenage, Ware A602 | J7 | Stevenage, Ware A602 |
| Welwyn, Welwyn Garden City A1000 | J6 | Welwyn, Welwyn Garden City A1000 |
| No access | J5 | No access |
| Welwyn Garden City, Hertford A414 | J4 | Welwyn Garden City, Hertford A414 |
| Hatfield Tunnel | ||
| St Albans A414 | J3 | St Albans A414 Potters Bar A1001 |
| Hatfield A1001 | J2 | No access |
| Start of motorway | J1 South Mimms services | Dartford (M11, M20) Heathrow (M1, M40, M4) M25 Barnet A1081 |
| Dartford (M11, M20) Heathrow (M1, M40, M4) M25 Barnet A1081 Non-motorway traffic | Road continues as A1 to Central London | |
This section opened in 1998.
| A1(M) Motorway | ||
| Northbound exits | Junction | Southbound exits |
| Road continues as A1 to Newark | J17 Peterborough services | Peterborough A1139 Non-motorway traffic |
| Peterborough A1139 | Start of Motorway | |
| Yaxley, Stilton A15 | J16 | Yaxley, Stilton A15 |
| Sawtry B1043 | J15 | Sawtry B1043 |
| Start of Motorway | J14 | Alconbury, Huntingdon, Cambridge, Felixstowe A14 (M11) London THE CITY and EAST |
| Alconbury B1043 Non-motorway traffic | Road continues as A1 to Sandy | |
This section opened in 1961 and is one of the oldest sections of motorwat in Britain.
| A1(M) Motorway | ||
| Northbound exits | Junction | Southbound exits |
| Road continues as A1 to Wetherby | J38 | South Elmsall, Ackworth, Wakefield A638 Non-motorway traffic |
| South Elmsall, Ackworth, Wakefield A638 | Start of Motorway | |
| Barnsley, Thurnscoe A635 | J37 | Barnsley, Thurnscoe A635 |
| Doncaster, Doncaster Railport, Conisbrough A630 | J36 | Doncaster, Doncaster Railport, Conisbrough A630 |
| Sheffield, Rotherham Hull, Scunthorpe, Doncaster Robin Hood Airport M18 | J35 | Sheffield, Rotherham Hull, Scunthorpe, Robin Hood Airport M18 |
| Start of motorway | J34 Terminus | The SOUTH, Newark A1 Bawtry A614 Blyth B6045 Blyth services |
This section opened in sections:
| A1(M) Motorway | ||
| Northbound exits | Junction | Southbound exits |
| Road continues as A1 to Wetherby | J44 | Leeds, York A64 Non-motorway traffic |
| Leeds, York A64 | Start of Motorway | |
| No access | J43 | The SOUTH, Leeds M1 |
| Leeds, Selby A63 | J42 | Selby A63 |
| Hull, Goole, Manchester, Pontefract, Leeds M62 | J41 | Hull, Goole, Manchester, Pontefract, Leeds M62 Ferrybridge services |
| Start of motorway | J40 | No access |
| Knottingley A162 Non-motorway traffic Ferrybridge services | Road continues as A1 to Doncaster | |
Work to upgrade to dual 3-lane motorway standard underway, due for completion May 2009. Work includes the numbering of the current junction with the A659 as Junction 45, an additional bridge over the River Wharfe, widening of the current dual carriageway past Wetherby Racecourse and provision of a local access road to serve the villages of Boston Spa, Thorner and Bramham.
This section opened in stages:
| A1(M) Motorway | ||
| Northbound exits | Junction | Southbound exits |
| Road continues as A1 to Scotch Corner | J49 | Thirsk, Middlesbrough A168 (A19) Non-motorway traffic |
| Thirsk, Middlesbrough A168 (A19) | Start of Motorway | |
| Ripon, Boroughbridge A168 | J48 | Boroughbridge A168 Knaresborough A6055 |
| Knaresborough, Harrogate, Leeds Bradford International Airport A59 | J47 | York, Knaresborough A59 |
| Start of motorway | J46 Wetherby services (under construction ) | Kirk Deighton, Wetherby A168 |
| Kirk Deighton, Wetherby A168 Non-motorway traffic | Road continues as A1 towards Doncaster | |
Due to junction numbers further north being based on older rejected plans which included more planned junctions there will not be a Junction 54 or 55.
This section in stages:
| A1(M) Motorway | ||
| Northbound exits | Junction | Southbound exits |
| Road continues as A1 to Newcastle | J65 | Washington A1231 Non-motorway traffic |
| South Shields, Tyne Tunnel A194(M) | Start of Motorway | |
| Washington services | ||
| Washington A195 | J64 | Washington A195 |
| Chester-le-Street A167 Stanley A693 | J63 | Chester-le-Street A167 Stanley A693 |
| Durham, Sunderland A690 | J62 | Durham A690 |
| Spennymoor A688 Durham A177 | J61 Durham services | Bishop Auckland, Spennymoor A688 |
| Newton Aycliffe, Hartlepool, Ferryhill A689 | J60 | Newton Aycliffe, Hartlepool A689 |
| Newton Aycliffe A167 | J59 | Newton Aycliffe, Darlington, Stockton A167 |
| Shildon, Bishop Auckland A68 | J58 | Darlington A68 |
| Darlington, Stockton, Middlesbrough A66(M) | J57 | No access |
| Start of Motorway | J56 | Melsonby, Barton B6275 |
| Melsonby, Barton B6275 Non-motorway traffic | Road continues as A1 towards Wetherby | |