A1 road (Great Britain)

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A1
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Length	410 mi (660 km)
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Location
Country	United Kingdom
Primary destinations	London, Hatfield, Stevenage, Biggleswade, Huntingdon, Peterborough, Stamford, Grantham, Newark-on-Trent, Retford, Doncaster, Pontefract, Leeds, Wetherby, Harrogate, Ripon, Scotch Corner, Darlington, Durham, Gateshead, Newcastle upon Tyne, Morpeth, Alnwick, Berwick-upon-Tweed, Haddington and Edinburgh
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A1 is the official title of the Great Northern Road in England. It runs up the eastern side of England from London to Edinburgh in Scotland. It is six hundred and sixty kilometres long, making it the longest numbered road in the U.K.. The A1 has six major junctions with motorways, and over twenty major junctions with other A roads.

The A1 follows, for much of the way, the course of a Roman road, Ermine Street, and the old coach route to Edinburgh. It is not a motorway, but a lot of it is now built to motorway standards. It is one of two main roads going from London to Northern England, the other being the M1 motorway.

Passing through Nottinghamshire, the road skirts the remains of Sherwood Forest. 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 car traffic. From North Yorkshire to Durham the road follows, for part of the way, another Roman road called Dere Street. This road ran from Eboracum (York) to the Antonine Wall in the lowlands of present-day Scotland.

Some parts of the A1 are motorways, and these parts are numbered A1(M).