A1(M) motorway
A1(M) motorway
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A1(M) motorway

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A1(M) motorway

A1(M) is the designation given to a series of four separate motorway sections in the UK. Each section is an upgrade to a section of the A1, a major north–south road which connects London, the capital of England, with Edinburgh, the capital of Scotland. The first section, the Doncaster Bypass, opened in 1961 and is one of the oldest sections of motorway in Britain. Construction of a new section of A1(M) between Leeming and Barton was completed on 29 March 2018, a year later than the anticipated opening in 2017 due to extensive archaeological excavations. Its completion linked the Barton to Washington section with the Darrington to Leeming Bar section, forming the longest A1(M) section overall and reducing the number of sections from five to four.

In 2015, a proposal was made by three local government organisations to renumber as M1 the section of A1(M) between Micklefield and Washington, making this section a northern extension of the M1.

Most of the English section of the A1 is a series of alternating sections of primary route, dual carriageway and motorway. From Newcastle upon Tyne to Edinburgh it is a trunk road with alternating sections of dual and single carriageway. The table below summarises the road as motorway and non-motorway sections. Most of the non-motorway sections do not have junction numbers, with the exception of the Newcastle Western Bypass which continues the junction numbering of the A1(M).

From London to Sunderland, 123.33 miles (198.48 km) of the route are non-motorway while the remaining 145.38 miles (233.97 km) are to motorway standards.

The motorway sections are discussed below.

This section opened in stages:

This section runs through the Cambridgeshire countryside between Alconbury and Peterborough. It was officially opened by Lord Whitty on 31 October 1998, and is the most isolated of the motorway sections as it connects with no other motorway. It is designed to a noticeably high standard, 8 miles (13 km) of it being four lanes from junction 14 at Alconbury to junction 16 at Norman Cross in each direction whilst the remainder has three lanes in each direction. It is managed by Road Management Services (Peterborough) under a DBFO contract with National Highways.

Following the rerouting of the A14 road in 2019 at Brampton Hut interchange this section needs review.

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