Map of the United Kingdom [GM] - Size A1-59.4 x 84.1cm - Vinyl

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The most southern part of the A1 starts in Aldersgate in London and heads north passing through the capital to Borehamwood. The A1 is the most recent route to head north out of London, passing through York and beyond. A1 Leeming to Barton Improvement". Highways Agency. Archived from the original on 30 April 2014 . Retrieved 24 April 2014.

Following the rerouting of the A14 road in 2019 at Brampton Hut interchange this section needs review. A1(M) motorway junctions The M25 to Stotfold section is 23 miles (37km), and was constructed between 1962 and 1986. The main destinations are Hatfield, Welwyn Garden City, Stevenage, and Letchworth. It opened in five stages: junctions 1 to 2 in 1979; 2 to 4 in 1986; 4 to 6 in 1973; 6 to 8 in 1962; and 8 to 10 in 1967. The table was drawn up by reading values from the AA Route Planner for the journey Bank of England, London to Waverley Station, Edinburgh via Wittering. Adjustments were made for sections of the route that were not part of the A1. "Route planner". AA. Archived from the original on 31 January 2011 . Retrieved 15 January 2011. Route of Proposed Sandy/Beeston Bypass" (PDF). Highways Agency. Archived from the original (PDF) on 5 June 2011 . Retrieved 2 July 2009. The A1 around Durham, Gateshead and Newcastle has seen a number of incarnations, following routes through, to the east and to the west of both Gateshead and Newcastle. See A1 (Newcastle upon Tyne) for more information.

It was also announced in 2014 that new technology would be implemented to bring the road to motorway standards, including detection loops, CCTV cameras and variable message signs to provide better information for drivers and active traffic management across Tyne and Wear, [34] while Junction 6 (Welwyn North) to Junction 8 (Hitchin) would be upgraded to smart motorway, including widening of a two-lane section to dual three lanes and hard shoulder running. [44] This plan to upgrade to smart motorway has now been cancelled. [49] A1 north of Ellingham- This project will be starting in 2018 and will improve junction improvements and crossing facilities for pedestrians and cyclists.

A1(M) upgrade in North Yorkshire nears completion – even more motorway for road users". Highways Agency. Archived from the original on 9 February 2008 . Retrieved 21 March 2012.a b "A14 Ellington to Fen Ditton Scheme". Highways Agency. Archived from the original on 31 January 2008 . Retrieved 20 January 2008. Plans to dual the single carriageway section of road north of Newcastle upon Tyne were shelved in 2006 as they were not considered a regional priority by central government. The intention was to dual the road between Morpeth and Felton and between Adderstone and Belford. [24] A1(M) Wetherby to Walshford". Highways Agency. Archived from the original on 30 August 2008 . Retrieved 6 August 2008. Some sections of the A1 have been upgraded to motorway standard. These are known as the A1(M) and include: Work on upgrading the Leeming Bar to Barton section to three-lane motorway began in April 2014. Work was expected to be completed by summer 2017. [11] In early 2017, the Highways Agency announced that the full opening would be delayed until December 2017. [12] In the end, the motorway opened up on 29 March 2018, making the A1 continuous motorway standard from Darrington, West Yorkshire, to Washington, Tyne and Wear, though residual works were still to be completed. [13]