Editing M1 motorway

{{Short description|First inter-urban motorway in the UK}}
{{About|the M1 motorway in England|other M1 motorways|List of M1 roads}}
{{Distinguish|A1(M) motorway}}

{{Use British English|date=May 2013}}
{{Use dmy dates|date=November 2024}}

{{Infobox road
| country = ENG
| type = M
| route = 1
| alternate_name = [[London]] – [[Yorkshire]] motorway
| map = {{switcher
  | {{maplink-road|from=M1 motorway.map}}M1 highlighted in blue{{hr}}
  | Show interactive map
  | [[File:M1 motorway (Great Britain) map.svg|frameless|x323px]]<br />Shown with UK motorway network{{hr}}
  | Show UK motorways map
   }}
| map_custom = yes
| map_notes = 
| photo = Motorway M1 Yorkshire 2007-08-13.jpg
| photo_notes = Looking north towards junction 37 on one of the few stretches that remain three-lane, 2007
| length_mi = 193.5
| length_ref = <ref>{{cite web|title=Driving directions to M1|url=https://maps.google.com/maps?saddr=M1&daddr=M1&hl=en&ll=52.556316,-0.966797&spn=4.034994,9.602051&sll=51.571188,-0.228277&sspn=0.004028,0.009377&geocode=FW_uEgMd4Yb8_w%3BFZVCNQMdNJLr_w&t=h&mra=mift&mrsp=0&sz=17&z=7|publisher=Google Maps|access-date=13 October 2013}}</ref>
| established = 1959
| history = Opened: 1959<br />Completed: 1999
| direction_a = South
| direction_b = North
| terminus_a = [[Staples Corner]], [[London]] ([[A406 road|A406]])<br />{{coord|51.5755|-0.2351|type:landmark_region:GB|display=inline|name=M1 Motorway (southern end)}}
| terminus_b = Hook Moor, [[West Yorkshire]] ([[A1(M)]])<br />{{coord|53.8229|-1.3388|type:landmark_region:GB|display=inline|name=M1 motorway (northern end)}}
| counties = [[Greater London]], [[Hertfordshire]], [[Bedfordshire]], [[Buckinghamshire]], [[Northamptonshire]], [[Leicestershire]], [[Nottinghamshire]], [[Derbyshire]], [[Yorkshire]] ([[South Yorkshire|South]] & [[West Yorkshire| West]])
| destinations = [[London]]<br />[[Brent Cross]]<br />[[Watford]]<br />[[St Albans]]<br />[[Hemel Hempstead]]<br />[[Luton]]<br />[[Milton Keynes]]<br />[[Northampton]]<br />[[Rugby, Warwickshire|Rugby]]<br /> [[Leicester]]<br />[[Loughborough]]<br />[[Nottingham]]<br />[[Derby]]<br />[[Mansfield]]<br />[[Chesterfield, Derbyshire|Chesterfield]]<br />[[Sheffield]]<br />[[Rotherham]]<br />[[Barnsley]]<br />[[Wakefield]]<br />[[Leeds]]
| e-road = {{Jct|country=EUR|E|13}}
| maint = [[National Highways]]
| junction = [[File:Junction 6a.svg|1000x20px]] [[File:UK-Motorway-M25.svg|1000x20px]]<br />J6a → [[M25 motorway]]<br />[[File:Junction 17.svg|1000x20px]] [[File:UK-Motorway-M45.svg|1000x20px]]<br />J17 → [[M45 motorway]]<br />[[File:Junction 19.svg|1000x20px]] [[File:UK-Motorway-M6.svg|1000x20px]]<br />J19 → [[M6 motorway]]<br />[[File:Junction 21.svg|1000x20px]] [[File:UK-Motorway-M69.svg|1000x20px]]<br />J21 → [[M69 motorway]]<br />[[File:Junction 32.svg|1000x20px]] [[File:UK-Motorway-M18.svg|1000x20px]]<br />J32 → [[M18 motorway (Great Britain)|M18 motorway]]<br />[[File:Junction 42.svg|1000x20px]] [[File:UK-Motorway-M62.svg|1000x20px]]<br />J42 → [[M62 motorway]]<br />[[File:Junction 43.svg|1000x20px]] [[File:UK-Motorway-M621.svg|1000x20px]]<br />J43 → [[M621 motorway]]<br />
 [[File:UK-Motorway-A1 (M).svg|1000x20px]]<br />[[A1(M) motorway]]
| previous_type = M
| next_type = M
| previous_route = 1
| next_route = 2
| next_dab = Great Britain
}}

The '''M1 motorway''' connects [[London]] to [[Leeds]], where it joins the [[A1(M) motorway|A1(M)]] near [[Aberford]], to connect to [[Newcastle upon Tyne|Newcastle]]. It was the first inter-urban [[motorway]] to be completed in the UK;<ref name="archive">{{cite web|url=http://www.iht.org/motorway/m1m10m45.htm |archive-url=https://web.archive.org/web/20021104195212/http://www.iht.org/motorway/m1m10m45.htm |url-status=dead |archive-date=4 November 2002 |title=Motorway archive |publisher=Institute of Highways and Transportation |access-date=20 January 2008 }}</ref> the first motorway in the country was the [[Preston Bypass]], which later became part of the [[M6 motorway|M6]].<ref name="Highways Agency">{{cite web|url=http://www.highways.gov.uk/knowledge/338.aspx |title=Key facts about England's motorways and trunk roads |publisher=Highways Agency |access-date=20 January 2008 |url-status=dead |archive-url=https://web.archive.org/web/20071212114003/http://www.highways.gov.uk/knowledge/338.aspx |archive-date=12 December 2007 }}</ref>

The [[motorway]] is {{convert|193|mi}} long and was constructed in four phases. Most of the motorway was opened between 1959 and 1968. The southern end was extended in 1977 and the northern end was extended in 1999. 

It is also the second longest motorway in the country with the [[M6 motorway]] being the longest at 232 miles (373 km). 

==History==
There had been plans before the [[Second World War]] for a motorway network in the United Kingdom. [[John Douglas-Scott-Montagu, 2nd Baron Montagu of Beaulieu|Lord Montagu of Beaulieu]] formed a company to build a 'motorway-like road' from London to Birmingham in 1923,<ref>{{cite book|url=https://books.google.com/books?id=ndZVcax375EC&pg=PA65|title=The motorway achievement volume 1|page=57|year=2004|isbn=978-0-7277-3196-8|author1=Bridle, Ron|author2=Baldwin, Peter|author3=Baldwin, Robert|publisher=Thomas Telford }}</ref> but it was a further 26 years before the [[Special Roads Act 1949]] was passed, which allowed for the construction of roads limited to specific vehicle classifications, and in the 1950s, the country's first motorways were given the government go-ahead.

The first section of motorway was the Preston Bypass in [[Lancashire]], now part of the [[M6 motorway]], which opened in 1958.<ref name="Highways Agency"/> The M1 was Britain's first full-length motorway and opened in 1959.{{cn|date=September 2024}} The early M1 had no [[speed limits]], [[crash barrier]]s, or lighting, and had [[soft shoulder]]s rather than hard. As there was then little traffic, London musicians such as the Rolling Stones were known to speed up to take advantage of the [[Watford Gap services|Watford Gap Motorway Services Area]], open 24 hours at a time when pubs closed at 11 p.m.<ref>{{cite news |last=Topham |first=Gwyn |date=3 November 2023 |title=Watford Gap: M1 services that hosted Stones and Beatles faces demolition |work=The Guardian |url=https://www.theguardian.com/uk-news/2023/nov/03/watford-gap-motorway-services-stones-beatles-jimi-hendrix-ev |access-date=3 November 2023 |issn=0261-3077}}</ref>

===First section, 1959===
[[File:Toddington - M1 Motorway under construction 1725951 0d6f8279.jpg|thumb|left|Looking north from B579 bridge at [[Chalton, Bedfordshire|Chalton]]. Former cement works at [[Sundon]] to the right (May 1958)]]
The first section of the motorway, between junction 5 ([[Watford]]) and junction 18 ([[Crick, Northamptonshire|Crick]]/[[Rugby, Warwickshire|Rugby]]), opened on 2 November 1959, together with the motorway's two spurs, the [[M10 motorway (Great Britain)|M10]] (from junction 7 to south of [[St Albans]] originally connecting to the A1) and the [[M45 motorway|M45]] (from junction 17 to the [[A45 road|A45]] and [[Coventry]]). Parts of the [[Hertfordshire]] section were built using [[steam roller]]s.<ref>{{cite web
 |title       = Tri-tandem roller 45655 of 1930
 |url         = http://www.therobeytrust.co.uk/Stocklist%20tri-tandem%20roller.htm
 |publisher   = The Robey Trust
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20110722134904/http://www.therobeytrust.co.uk/Stocklist%20tri-tandem%20roller.htm
 |archive-date = 22 July 2011
}}</ref>

The M1 was officially inaugurated from [[Slip End]] (close to Luton), celebrated by a large concrete slab on the bridge next to the village,<ref>{{cite web|url=http://www.slipend.co.uk/Info/Local%20History/images/The%20Slab.jpg|title=The Slab|access-date=20 January 2008|archive-url=https://web.archive.org/web/20120207112302/http://www.slipend.co.uk/Info/Local%20History/images/The%20Slab.jpg|archive-date=7 February 2012|url-status=dead}}</ref> with inscription "London-Yorkshire Motorway – This slab was sealed by the [[Harold Watkinson, 1st Viscount Watkinson|Harold Watkinson]] M.P. – Minister of Transport – Inauguration Day – 24th March 1958". It was relocated, during widening works in 2007–08, to the eastern side of junction 10.

[[File:Chalton - M1 Motorway under construction.txt 1725911 0aaeb0d3.jpg|thumb|left|Looking north from a similar position south of Toddington services (July 1959)]]
This section of the M1 broadly follows the route of the [[A5 road (Great Britain)|A5]] north-west. It started at the Watford Bypass ([[A41 road|A41]]), which runs south-east to meet the [[A1 road (Great Britain)|A1]] at Apex corner, and ended on the A5 at Crick. The M10 spur motorway connected the M1 to the North Orbital Road ([[A405 road|A405]]/[[A414 road|A414]], a precursor of the [[M25 motorway|M25]]) where it also met the A5 (now renumbered here as the [[A5183 road|A5183]]) and, {{convert|2|mi|km}} to the east via the A414, the [[A6 road (England)|A6]], which subsequently became part of the M25.

A £1.5&nbsp;million contract was given in May 1958 for the most southerly section, from Aldenham to Beechtrees (the M10 junction), for two lanes of [[reinforced concrete]], to open in November 1959.<ref>''Luton News and Bedfordshire Chronicle'' Thursday 22 May 1958, page 3</ref> There was immense flooding on this section in July 1958.<ref>''Luton News and Bedfordshire Chronicle'' Thursday 3 July 1958, page 1</ref>

Although the whole of the first section opened in 1959, it was built in two parts, with the northern part (junctions 10 to 18) being built by [[John Laing plc|John Laing]]<ref name="archive"/> and the southern part (the St Albans Bypass) being built by [[Tarmac Limited|Tarmac Construction]].<ref>{{cite web|url=http://www.iht.org/motorway/m1eastamat.htm |work=Motorway archive |title=list of material held by Northamptonshire CC |access-date=20 January 2008 |url-status=dead |archive-url=https://web.archive.org/web/20080126112253/http://www.iht.org/motorway/m1eastamat.htm |archive-date=26 January 2008 }}</ref>

The headquarters of the Laing project was on Wolverton Road in Newport Pagnell.<ref>''Wolverton Express'' Friday 20 November 1959, page 1</ref> The motorway was opened by Ernest Marples at the [[Pepperstock]] Junction (junction 10), previously a motorway spur, now the A1081.<ref>''Coventry Evening Telegraph'' Monday 2 November 1959, page 1</ref> The two motorway projects, the St Albans Bypass and the Pepperstock-Crick section met at Luton.

On the opening of the M1, the first person to reach the Birmingham end of the new section of motorway was anaesthesist Eric Plumpton (Dr Frederic Salkeld Plumpton, 1933-2016) in his [[Triumph TR2]], travelling 23 miles from [[Upper Heyford, Northamptonshire]] in 14 minutes (98.5 mph average speed) at about 10.10am.<ref>[https://rcoa.ac.uk/obituary-dr-frederic-salkeld-plumpton Eric Plumpton, first driver to reach the M1 north end]</ref><ref>''Coventry Evening Telegraph'' Monday 2 November 1959, page 1</ref> The northern end of the M1 and M45 opened at 9.56am.<ref>''Rugby Advertiser'' Tuesday 3 November 1959, page 3</ref>

===Rugby to Leeds, 1965 to 1968===
The continuation of the motorway from junction 18 towards Yorkshire was carried out as a series of extensions between 1965 and 1968. Diverging from the A5, the motorway takes a more northerly route through the [[East Midlands]], via [[Leicester]], [[Loughborough]], [[Nottingham]] to [[Sheffield]], where the [[M18 motorway (Great Britain)|M18]] splits from the M1 at junction 32 to head to [[Doncaster]].

Originally, the M1 was planned to end at Doncaster but it was decided to make what was going to be the "[[Leeds]] and Sheffield Spur" into the primary route, with the {{convert|11|mi|adj=on}} section to the [[A1(M) motorway|A1(M)]] south of Doncaster given the separate motorway number M18.

From junction 32, the motorway passes Sheffield, [[Rotherham]], [[Barnsley]] and [[Wakefield]], reaching the original end of the motorway at (the original) Junction 44 to the east of Leeds. There were plans to route the M1 from just south of junction 42, where it interchanges with the [[M62 motorway|M62]], round the west of Leeds to the A1 at [[Dishforth]]. The chosen route passes to the east of Leeds. With the M62 and [[M621 motorway|M621]], the M1 forms a ring of motorways around the south of Leeds.

===Leeds South Eastern Urban Motorway, 1972===
[[File:M1 and M621.jpg|thumb|left|The M1 and [[M621 motorway|M621]] interchange on the northbound carriageways at [[Leeds]]]]
In 1972, an extension of the M1 was opened into central Leeds as the Leeds South Eastern Motorway, where it met the Leeds South Western Motorway (M621) coming north-east from the M62 at junction 3.

===Lighting===
In July 1972, the then UK Minister for Transport Industries, [[John Peyton, Baron Peyton of Yeovil|John Peyton]], announced that {{convert|86|mi|0}} of UK motorway particularly prone to fog would benefit from lighting in a project that "should be" completed by 1973.<ref name=Autocar197207>{{cite journal |title = News: Motorway lighting| journal = [[Autocar (magazine)|Autocar]] | volume =  137 nbr 3978| page = 19| date = 13 July 1972}}</ref> Sections to be illuminated included the M1 between junctions 3 and 14, and between junctions 16 and 24.<ref name=Autocar197207/>  In August 2011, the Highways Agency announced that, despite being converted to Smart Motorway status, the lights will be switched off on stretches of the motorway between junctions 10 (Luton) and 15 (Northampton) without affecting road user safety. The motorway junctions and their approaches, and a section of the M1 on either side of junction 11 (north Luton), would have lighting columns replaced and remain lit. All lighting columns from junctions 10 to 14 were removed completely, apart from some on slip roads.<ref name="HA press release, lighting M1 J10-13">{{cite web|url=http://nds.coi.gov.uk/content/detail.aspx?NewsAreaId=2&ReleaseID=420762&SubjectId=2 |title=HA press release M1 J10-13 lighting |publisher=Nds.coi.gov.uk |access-date=31 December 2011 |url-status=dead |archive-url=https://web.archive.org/web/20120119014428/http://nds.coi.gov.uk/content/detail.aspx?NewsAreaId=2&ReleaseID=420762&SubjectId=2 |archive-date=19 January 2012 }}</ref>

===Safety barriers===
An increasing official interest in secondary safety was evident in an announcement in March 1973 that work would begin shortly on erecting "tensioned safety barriers" along the central reservation of a {{convert|34|mi|km|adj=on}} section of the M1 between [[Kegworth]] (J24) and [[Barlborough]] (J30).<ref name=Motor197303>{{cite journal |title = Motorweek: More M1 barriers| journal =[[The Motor|Motor]]| volume = nbr 3677| page = 40| date = 31 March 1973}}</ref>

===Leeds to Hook Moor, 1999===
Between 1996 and 1999, the M1 section north of the M62 underwent a major reconstruction and extension to take the M1 on a new route to the A1(M) at [[Aberford]]. The new road involved the construction of a series of new junctions, bridges and viaducts to the east of Leeds. When the new section of M1 was completed and opened on 4 February 1999,<ref>{{cite web|url = http://assets.highways.gov.uk/our-road-network/pope/major-schemes/A1-Bramham-Wetherby/A1%20Bramham%20to%20Wetherby%20POPE%20OYA%20-%20website%20version.pdf|title = A1(M) Bramham to Wetherby – One Year After Study|access-date = 4 November 2015|publisher = Highways Agency|page = 8|archiveurl=https://web.archive.org/web/20160304100915/http://assets.highways.gov.uk/our-road-network/pope/major-schemes/A1-Bramham-Wetherby/A1%20Bramham%20to%20Wetherby%20POPE%20OYA%20-%20website%20version.pdf|archivedate=4 March 2016|url-status=dead}}</ref> the Leeds South Eastern Motorway section of the M1 was re-designated as the M621, and the junctions were given new numbers: M621 junctions 4 to 7.

===London extensions, 1966, 1967 and 1977===
{{unreferenced section|date=October 2017}}
[[File:M1 construction.png|upright=0.9|thumb|right|Map showing construction dates of sections of the M1]]
[[File:M1 Motorway, Junction 4 - geograph.org.uk - 85978.jpg|right|thumb|M1 at junction 4. The old overhead lane control gantries are still visible, which were replaced with newer, verge-mounted MS4 [[Variable-message sign|variable message signs]] in 2008.]]
The M1 was extended south towards London from its original starting point at junction 5, in three stages. The first stage, opened in 1966, took the motorway south-east, parallel to the [[A41 road|A41]], to meet the A5 at junction 4 south of [[Elstree]]. The second phase continued east to [[Scratchwood]] ([[London Gateway Service Area|London Gateway Services]], which occupies the location of the missing junction 3, from where an unbuilt spur would have connected to the A1 at Stirling Corner to the north-east). The M1 then runs south alongside the [[Midland Main Line]] towards [[Hendon]], where it meets the A1 again at junction 2 via a tightly curved flyover section. These flyovers connecting from the A1 were originally both for northbound traffic: the left one as the on-ramp to the M1, the right one going over the A1/A41 junction beneath to rejoin the A1 northbound.

Junction 2 is about {{convert|2.5|mi|km|0}} south of the original junction 3. Before the completion of junction 2, southbound traffic left the motorway via a slip road which passed around the back of the now disused Homebase and under the A41/A1 Mill Hill Bypass, and looped round to join it at Fiveways Interchange. This slip road is still visible to southbound traffic approximately {{convert|650|yd|m}} before junction 2, and was maintained until the early 2000s, even though not accessible to traffic. The northbound slip road from the A1 is now partially used as the entrance way to a retail park and was once carried by bridge, but no longer reaches the northbound carriageway, because it is cut off by the motorway continuing south.

The final section of the M1 was opened to junction 1 at [[Staples Corner]] in 1977. There the motorway meets the [[A406 road|North Circular Road]] (A406) at a [[grade separation|grade separated]] junction and roundabout. Unrealised plans from the 1960s would have seen the motorway continue through the junction on an elevated roadway to end at [[West Hampstead]], where it would have met the [[North Cross Route]], the northern section of the [[London Ringways#Ringway 1|London Motorway Box]], a proposed ring of urban motorway around the central area. The layout of the Staples Corner junction was originally built in accordance with those plans, although most of the [[London Ringways]] Plan had been cancelled by 1973. Around the same time, the section between the then-M10 and junction 5 was widened from the original two lanes to three.

On its completion, the M1 acted as a fast link road between London and [[Birmingham]] via the M6. It also provided a link to [[London Luton Airport]] for those regions, and its proximity to the site of the [[new town]] of [[Milton Keynes]] (designated in 1967) meant that it was soon providing a vital transport link to another major area.

===Recent developments===
In 2006, plans were published for the widening of {{convert|91|mi|km}} from Leicester through to Leeds (junctions 21–42) to four lanes each way.

Escalating costs across the whole of the Highways Agency programme, including the M1 project, on which costs had risen to £5.1&nbsp;billion, as well as increasing opposition to major road expansion,<ref>{{cite news|url=http://news.bbc.co.uk/1/hi/england/nottinghamshire/6098408.stm|title=Protesters unfurl anti-M1 banners|work=BBC News | date=30 October 2006 | access-date=12 May 2010}}</ref><ref>{{cite web|url=https://theecologist.org/2007/jul/31/campaigners-outraged-escalating-costs-road-widening|title=Campaigners outraged at escalating costs of road widening|website=The Ecologist|date=31 July 2007 }}</ref> as well as criticisms by the Transport Select Committee and the [[National Audit Office (United Kingdom)|National Audit Office]], led to wide-ranging re-assessments of the Agency's project costs.<ref>{{cite news|url=http://observer.guardian.co.uk/uk_news/story/0,,2073611,00.html|title=M1 widening to cost £21m per mile|work=[[The Observer]]|date=6 May 2007|access-date=28 January 2008 | location=London | first=Juliette | last=Jowit}}</ref> Widening was scaled back to the junctions 6A to 10 scheme that was already in progress, and from Nottingham and Mansfield (junctions 25–28), and [[Smart motorway|hard shoulder running]] was to be used for other sections.

Many later developments, including smart motorway schemes, have been made to the M1, and these are detailed below. Recent concerns about accidents and deaths on the former hard shoulder have led to a halt and review into extending all lane running which reported in July 2021.<ref>{{cite web | url=https://www.gov.uk/government/publications/smart-motorway-evidence-stocktake-and-action-plan | title=Smart motorway evidence stocktake and action plan }}</ref>{{Failed verification|date=April 2024}}

==Developments==
===A5-M1 Link (Dunstable Northern Bypass)===
{{Infobox Future Infrastructure Project
|property_name = A5-M1 Link (Dunstable Northern Bypass)
|location = Central Bedfordshire
|proposer = Highways Agency
|official website =
|status = Completed (summer 2017)
|type = Road
|estimated cost = £171{{nbsp}}million to £217{{nbsp}}million
|max cost =
|min cost =
|start = 2014
|finish = 2017
|image_name = Proposed Dunstable and Luton Northern Bypass.png
|image_size = 250px
|caption = The route of the Dunstable Northern Bypass proposal and route options for the connecting Luton Northern Bypass.
|osm_id =
|supporters =
|stakeholders =
|opponents =
|geometry = [http://umapper.s3.amazonaws.com/maps/kml/45349.kml KML]
}}
The A5-M1 Link (Dunstable Northern Bypass) is a two-lane dual carriageway running east from the A5 north of Dunstable joining the M1 at a new junction 11a south of Chalton.<ref>{{cite web|title=A5-M1 Link (Dunstable Northern Bypass)|url=http://www.highways.gov.uk/roads/road-projects/a5-m1-link-dunstable-northern-bypass|access-date=25 November 2014|archive-url=https://web.archive.org/web/20141104023258/http://www.highways.gov.uk/roads/road-projects/a5-m1-link-dunstable-northern-bypass/|archive-date=4 November 2014|url-status=dead}}</ref> Here, it is intended to join with a proposed Luton Northern Bypass to form a northern bypass for the wider conurbation. The A5-M1 Link aims to alleviate traffic congestion in Houghton Regis and Dunstable, reduce journey times for long-distance traffic travelling through Dunstable and improve the regional economy. The Highways Agency detrunked the A5 through Dunstable when the A5-M1 Link opened to the public in May 2017.<ref>{{cite web|title=Dunstable Town Centre Masterplan|url=http://www.centralbedfordshire.gov.uk/local-business/business-information-and-advice/developments/dunstable-town-centre-masterplan.aspx|access-date=25 November 2014|archive-url=https://web.archive.org/web/20140822142703/http://www.centralbedfordshire.gov.uk/local-business/business-information-and-advice/developments/dunstable-town-centre-masterplan.aspx|archive-date=22 August 2014|url-status=dead}}</ref> As part of the Dunstable Town Centre Masterplan, Central Bedfordshire Council built the {{convert|2.9|km|abbr=in}} Woodside Link to connect the new junction 11a to the industrial areas of Dunstable and Houghton Regis. Most of the road opened to traffic in autumn 2016 with the remaining section connecting to junction 11a.<ref>{{cite web|title=Woodside Link road|url=http://www.centralbedfordshire.gov.uk/woodsidelink|access-date=25 November 2014}}</ref>

===M1/M69 junction===
There is a proposal to widen the M1 to dual four-lane or dual five-lane between junctions 21 and 21a and construct a new link road between the M1 and the [[M69 motorway|M69]]. During this work the [[Leicester Forest East services]] would be closed, and possibly relocated.<ref>{{cite web|url=http://www.highways.gov.uk/roads/projects/14485.aspx |title=M1/M69 Public Consultation Information – The new solution |publisher=Highways Agency |access-date=7 January 2010 |url-status=dead |archive-url=https://web.archive.org/web/20090603171810/http://www.highways.gov.uk/roads/projects/14485.aspx |archive-date= 3 June 2009 }}</ref> Consultation took place in 2007.<ref>{{cite web|url=http://www.highways.gov.uk/roads/projects/14484.aspx |title=M1/M69 Public Consultation Information – what happens now |publisher=Highways Agency |access-date=7 January 2010 |url-status=dead |archive-url=https://web.archive.org/web/20090605162145/http://www.highways.gov.uk/roads/projects/14484.aspx |archive-date=5 June 2009 }}</ref><ref name="HA4347">{{cite web|title=M1 Junctions 21 to 31 Improvements|url=http://www.highways.gov.uk/roads/projects/4347.aspx|url-status=dead|archive-url=https://web.archive.org/web/20120717053402/http://www.highways.gov.uk/roads/projects/4347.aspx|archive-date=17 July 2012|access-date=9 July 2012|publisher=Highways Agency}}</ref> {{As of|May 2022}}, work on this scheme has still not begun.<ref>{{cite web|url=https://www.roads.org.uk/motorway/m69/10|title=M69 (M1 J21) Whetstone Interchange|website=Roads.org.uk}}</ref>

=== M1 junction 19 improvement ===
Following the report of a public inquiry in March 2013, the Secretary of State for Transport announced on 18 July 2013 that work to update the [[Catthorpe Interchange]] at junction 19, between the M1 motorway, [[M6 motorway]] and [[A14 road (England)|A14 road]], close to [[Catthorpe]],<ref name="HA11934">{{cite web|title=M1 Jct 19|url=http://www.highways.gov.uk/roads/projects/11934.aspx|url-status=dead|archive-url=https://web.archive.org/web/20080316011954/http://www.highways.gov.uk/roads/projects/11934.aspx|archive-date=16 March 2008|access-date=28 February 2008}}</ref> would go ahead.<ref>{{cite web|date=18 July 2013|title=Press release:Go ahead for two new road schemes in the Midlands|url=https://www.gov.uk/government/news/go-ahead-for-two-new-road-schemes-in-the-midlands|access-date=13 October 2013|publisher=Department for Transport}}</ref> Work on the £191{{nbsp}}million three-layer interchange started in January 2014.<ref>{{cite news|title=Catthorpe: £191&nbsp;million M1/M6/A14 junction improvement work to begin|url=http://www.leicestermercury.co.uk/Catthorpe-pound-191-million-M1-M6-A14-junction/story-20395398-detail/story.html|url-status=dead|access-date=13 July 2014|archive-url=https://web.archive.org/web/20140714151648/http://www.leicestermercury.co.uk/Catthorpe-pound-191-million-M1-M6-A14-junction/story-20395398-detail/story.html|archive-date=14 July 2014}}</ref> The scheme was fully opened to traffic in December 2016.<ref name="scheme">{{cite web|title=M1 Junction 19 Improvement Scheme|url=http://roads.highways.gov.uk/projects/m1-junction-19-improvement-scheme/|url-status=dead|archive-url=https://web.archive.org/web/20161129040519/http://roads.highways.gov.uk/projects/m1-junction-19-improvement-scheme/|archive-date=29 November 2016|access-date=11 January 2017|publisher=Highways Agency}}</ref>

=== A421 dualling from Milton Keynes to M1 junction 13 ===
In conjunction with the [[M1 motorway#Recent developments|M1 widening schemes]] and dualling of the A421 between M1 junction 13 and the A1 near St Neots, proposals were made to widen the A421 between the M1 junction 13 in Bedfordshire and the Kingston roundabout in Milton Keynes.<ref name=SEERA1>
{{cite web
 |url=http://www.southeast-ra.gov.uk/documents/factsheet/03.pdf
 |archive-url=http://webarchive.nationalarchives.gov.uk/20100702205428/http://www.southeast-ra.gov.uk/documents/factsheet/03.pdf
 |url-status=dead
 |archive-date=2 July 2010
|title=A421 Milton Keynes to M1 
 |publisher=[[South East England Regional Assembly]] 
 |access-date=22 July 2009 }}</ref> Exhibitions were held in June 2005 which rejected proposals to re-route the road in favour of widening the current road. In 2005, the project was given an estimated total cost of £33{{nbsp}}million.<ref name="BLTP1">
{{cite web |url=http://bedfordshire.gov.uk/ltp/section_15.html |title=Bedfordshire Local Transport Plan 2006/07 – 2010/11 – Major projects |publisher=Bedfordshire County Council |archive-url=https://web.archive.org/web/20160305233217/http://bedfordshire.gov.uk/ltp/section_15.html |archive-date=5 March 2016 |url-status=dead |access-date=9 December 2008}}</ref>

Funding of £23.5{{nbsp}}million was confirmed by the government for these works, as part of the [[South East Midlands Local Enterprise Partnership]] "Local Growth Deal".<ref>{{cite news|title=£23.5million project unveiled to upgrade A421 to dual carriageway |url=http://www.miltonkeynes.co.uk/news/local/23-5million-project-unveiled-to-upgrade-a421-to-dual-carriageway-1-6161006|work =Milton Keynes Citizen |access-date=27 January 2015 |date=7 July 2014}}</ref> As part of the government's [[Traffic bottleneck|pinch point]] reduction programme,  work commenced in 2014 on the A421 in Milton Keynes to improve the Kingston roundabout, and dual the section from it to (near) the Bedfordshire border, with the construction of two new roundabouts on the route. The road corridor includes a separate [[cycleway]].<ref name="Citizen 141220" />

The upgrade work for this final phase of the plan, the section running from junction 13 to [[Eagle Farm, Milton Keynes|Eagle Farm]] roundabout, started in September 2018 and was completed in December 2020.<ref name="Citizen 141220">{{cite news| title= Multi-million pound project improving road link between Bedford and Milton Keynes complete | url= https://www.miltonkeynes.co.uk/news/transport/multi-million-pound-project-improving-road-link-between-bedford-and-milton-keynes-complete-3067197 | author= Logan MacLeod | date= 14 December 2020 | access-date= 14 December 2020 | work = [[Milton Keynes Citizen]]}}</ref>

=== Smart Motorways ===
==== M1 widening and variable speed limits, junctions 6A to 10 (M25 to Luton South) ====
Work began on the {{convert|10|mi|km|adj=on}} section between the [[M25 motorway|M25]] and Luton (J6A-J10) in 2006 and opened in 2009, which included the construction of new parallel [[Local–express lanes|collector-distributor lanes]] between junctions 7 and 8.

The [[M10 motorway (Great Britain)|M10]] spur was built as a motorway because it inevitably led to the M1, but as non-motorway traffic could now travel between the A414 at Hemel Hempstead and Park Street Roundabout without having to access the M1, the M10 was downgraded to an [[Great Britain road numbering scheme|A road]], and designated as part of the [[A414 road|A414]] to allow for this. The work also included widening or replacement of 11 underbridges on one or both carriageways, and replacing seven overbridges<ref>{{cite web|title=M1 Jct 6a to 10 Widening|url=http://www.highways.gov.uk/roads/projects/4478.aspx|url-status=dead|archive-url=https://web.archive.org/web/20090916021803/http://www.highways.gov.uk/roads/projects/4478.aspx|archive-date=16 September 2009|publisher=Highways Agency}}</ref> at a total cost of £294&nbsp;million.<ref>{{cite web|title=9 Mar 2009 : Column 10W—continued|url=https://publications.parliament.uk/pa/cm200809/cmhansrd/cm090309/text/90309w0003.htm|work=Hansard}}</ref> A [[Smart motorway|variable mandatory speed limit]] system was installed, making this the first [[smart motorway]] scheme on the M1.

==== M1 dynamic hard shoulder running, junctions 10 to 13 (Luton South to Milton Keynes South) ====
Work to introduce [[Smart motorway#Dynamic hard shoulder running|dynamic hard shoulder running]] on approximately {{convert|15|mi|km}} of motorway between Luton and Milton Keynes (J10-J13) was completed in December 2012, at a total cost of £327&nbsp;million.<ref>{{cite web|title=M1 Junctions 10–13 Improvements|url=http://www.highways.gov.uk/roads/road-projects/m1-junction-10-13-improvements/|url-status=dead|archive-url=http://webarchive.nationalarchives.gov.uk/20140207102850/http://www.highways.gov.uk/roads/road-projects/m1-junction-10-13-improvements/|archive-date=7 February 2014|publisher=Highways Agency}}</ref> This made the hard shoulder available to be opened as a traffic lane where additional capacity was necessary. Modifications were made to junctions 11 and 12,<ref name="HA5">{{cite web|title=M1 Jct 10 to 13 Improvements|url=http://www.highways.gov.uk/roads/projects/4482.aspx|url-status=dead|archive-url=https://web.archive.org/web/20120629032930/http://www.highways.gov.uk/roads/projects/4482.aspx|archive-date=29 June 2012|publisher=Highways Agency}}</ref> to allow for four lanes running through each junction, and the [[A421 road|A421]] from junction 13 to the [[Bedford]] southern bypass was also upgraded to two lanes each way during this period.<ref>{{cite web|title=A421 Bedford to M1 Junction 13|url=http://www.highways.gov.uk/roads/projects/4584.aspx|url-status=dead|archive-url=https://web.archive.org/web/20110605115952/http://www.highways.gov.uk/roads/projects/4584.aspx|archive-date=5 June 2011|publisher=Highways Agency}}</ref> The scheme will likely be converted to [[Smart motorway#All lane running|all lane running]] at some point in the 2020 decade, alongside all other dynamic hard shoulder running schemes. This was because a Government review into smart motorways found dynamic hard shoulder running was too confusing for drivers, leading to plans to convert all dynamic hard shoulders into permanent running lanes.<ref>{{cite web|last=|title=Action plan announced to boost smart motorway safety|url=https://www.gov.uk/government/news/action-plan-announced-to-boost-smart-motorway-safety|access-date=19 June 2020|website=GOV.UK}}</ref>

==== M1 widening and variable speed limits, junctions 25–28 (Nottingham to Mansfield) ====
Work to widen the {{convert|15|mi|km|adj=on}} section from Nottingham to [[Mansfield]] (J25-J28) to four lanes each way began in October 2007 and was completed in May 2010, at a cost of £340&nbsp;million.<ref>{{cite web|title=M1 widening J25-28: work to reduce congestion and improve safety starts in earnest|url=http://www.highways.gov.uk/news/newsroom.aspx?pressreleaseid=156326|url-status=dead|archive-url=https://web.archive.org/web/20110605130555/http://www.highways.gov.uk/news/newsroom.aspx?pressreleaseid=156326|archive-date=5 June 2011|access-date=20 January 2008|publisher=Highways Agency}}</ref><ref>{{cite web|title=£340m M1 contract to MVM consortium|url=http://www.emcbe.com/january-constructive-article6.html|url-status=dead|archive-url=https://web.archive.org/web/20160117183458/http://www.emcbe.com/january-constructive-article6.html|archive-date=17 January 2016}}</ref> A 50&nbsp;mph limit, enforced by [[Traffic enforcement camera|average speed cameras]], was imposed for the period of construction, but it proved to be so effective that a permanent variable mandatory speed limit system was installed.<ref>{{cite news|date=3 January 2010|title=M1 works speed cameras will stay|work=BBC News|url=http://news.bbc.co.uk/1/hi/england/nottinghamshire/8438375.stm|quote=Temporary cameras installed for widening road works between junctions 25 and 28 have proved so effective they will stay, it has been confirmed.}}</ref> In 2023, following a previous debate on the issue, local MPs [[Mark Fletcher (politician)|Mark Fletcher]] and [[Lee Anderson (British politician)|Lee Anderson]] called on the government to upgrade junction 28, describing it as a "pinch point" disadvantaging local residents and businesses.<ref>[https://www.chad.co.uk/news/transport/mps-to-gather-in-westminster-to-call-for-improvements-to-m1-junction-near-mansfield-4142811 MPs to gather in Westminster to call for improvements to M1 junction near Mansfield] ''Chad'', 16 May 2023. Retrieved 27 December 2023</ref><ref>[https://www.bbc.co.uk/news/uk-england-derbyshire-67661397 M1: New plans for junction 28 upgrade to be sent to government] ''[[BBC News]]'', 11 December 2023. Retrieved 27 December 2023</ref>

==== M1 widening and variable speed limits, junctions 13–16 (Milton Keynes South to Northampton West) ====
National Highways converted the existing {{convert|23|mi| adj = on}} section of the M1 between Milton Keynes and Northampton (J13-J16) into an all-lane-running (ALR) smart motorway consisting of four lanes running in both directions without a hard shoulder, with the project's cost being £373{{nbsp}}million. Construction began in January 2018, with the scheme opening in stages until 9 March 2023, when the project was fully complete.<ref>{{cite web |url=https://nationalhighways.co.uk/our-roads/east/m1-junction-13-to-junction-16-smart-motorway/#documents |title=M1 junction 13 to junction 16: smart motorway |publisher = National Highways |date = 9 January 2023 |access-date = 22 January 2023}}</ref>

===Other proposals===
The speed limit between M1 junctions 33 to 34, near Rotherham, has been reduced to 60&nbsp;mph, to reduce levels of [[nitrogen dioxide]]. The plans were to be implemented before October 2020,<ref>{{cite web |url=https://www.bbc.co.uk/news/uk-england-54130862 |title=Motorways to trial 60mph limits to cut pollution |publisher = BBC News |date = 12 September 2020 |access-date =12 September 2020}}</ref><ref>{{cite news|last=Paton|first=Graeme|title=Motorway speed limit of 60mph to cut pollution|url=https://www.thetimes.com/uk/article/motorway-speed-limit-of-60mph-to-cut-pollution-x87rqcb20|work=[[The Times]]|date=12 September 2020|access-date=13 September 2020|issn=0140-0460|url-access=subscription}}</ref> and {{asof|2023|August|lc=yes}} the speed limit reduction is still in place.

==Incidents and accidents==
* On 12 October 1970, a woman, [[Barbara Mayo]], was abducted and murdered whilst hitchhiking up the motorway from London to Yorkshire. She was found dead in [[Ault Hucknall]] near the motorway in Derbyshire. The murder has never been solved.<ref>{{cite AV media|title=Crimewatch UK January 1991 |url=https://www.youtube.com/watch?v=RDOnBKjucuQ |publisher=BBC |access-date=17 February 2022 |format=TV appeal |date=January 1991}}</ref>
* On 16 March 1972, 200 vehicles crashed in thick fog resulting in the deaths of nine people on the M1 near Ridgmont, north of Luton.<ref>{{cite web|title=Road death toll mounts|url=https://www.telegraph.co.uk/news/1435738/Road-death-toll-mounts.html |archive-url=https://ghostarchive.org/archive/20220112/https://www.telegraph.co.uk/news/1435738/Road-death-toll-mounts.html |archive-date=12 January 2022 |url-access=subscription |url-status=live|date=13 July 2003|access-date=13 September 2020|website=The Telegraph}}{{cbignore}}</ref>
* On 8 January 1989, [[British Midland Flight 92]], a Boeing 737-400 aircraft crashed onto the embankment of the M1 whilst attempting an emergency landing at [[East Midlands Airport]] in [[Leicestershire]].{{cn|date=January 2023}} There were no ground casualties nor vehicular damage on the motorway as a result of the crash, however 47 passengers on board the aircraft were killed and a further 74 passengers and crew members were seriously injured.
* On 6 September 1997, large sections of the northbound carriageway were closed between London and Northampton to allow for the funeral procession of [[Diana, Princess of Wales]] to [[Althorp]]. In an unprecedented event, police allowed pedestrians onto the normally busy northbound carriageway almost the entire length of the route to pay their respects.{{cn|date=January 2023}}
* On 11 June 2003, three military tanks were thrown across the carriageway near junction 19 near Lutterworth when the transporter carrying them was involved in a crash; five people were killed.<ref name="2003M1Crash">{{cite news|url=http://news.bbc.co.uk/1/hi/england/leicestershire/2980640.stm|title=Five killed in M1 crash|publisher=BBC News|work=BBC News|quote=Eyewitnesses say the accident happened after a military transporter jack-knifed and scattered armoured vehicles across the carriageway}}</ref>
* An {{convert|18|mi|adj=on}} stretch of the motorway was closed entirely on the morning of 11 December 2005, following [[Buncefield fire|a major explosion and fire at the Buncefield Oil Depot]] which is less than half a mile (800&nbsp;m) from the M1.
* In June 2007, the section of M1 between junctions 32 and 36 was closed for a number of days after the [[Ulley Reservoir]] developed cracks after being deluged in the [[2007 United Kingdom floods]].{{cn|date=January 2023}}
* Part of the motorway close to Tinsley Viaduct was closed to allow safe demolition of the [[Tinsley Viaduct#Tinsley cooling towers|Tinsley cooling towers]] in the early hours of 24 August 2008.<ref name="tinsdemo">{{cite news|url=http://news.bbc.co.uk/1/hi/england/south_yorkshire/7578266.stm|title=Blast demolishes landmark towers|publisher=BBC News|work=BBC News|access-date=24 August 2008 | date=24 August 2008}}</ref> The M1 remained closed for much of the day until the stability of the viaduct was confirmed.
* On 15 April 2011, a {{convert|7|mi|sing=on}} stretch of the road was closed between Junctions 1 and 4 due to a fire at a scrapyard underneath the motorway.<ref name="2011Closure">{{cite news|url=https://www.bbc.co.uk/news/uk-england-london-13154063 |title=M1 is fully reopened after Mill Hill scrapyard fire |publisher=BBC News|work=BBC News|access-date=26 April 2011 | date=26 April 2011}}</ref> The road was fully re-opened early on 21 April 2011 with a 50&nbsp;mph speed limit in force whilst repair work continued to an elevated section.<ref name="2011Closure" />
* On 26 August 2017, two lorries and a minibus crashed between junctions 14 and 15, near Newport Pagnell, shutting down the motorway for most of the day. Eight people were killed and three severely injured. The drivers of the lorries were charged with dangerous driving, with one also charged with drunk driving.<ref name="2017M1Crash">{{cite news|url=http://metro.co.uk/2017/08/26/several-dead-after-two-lorries-crash-with-minibus-on-m1-6880073/ |title=Eight dead in M1 horror crash after two lorries collide with minibus 'carrying children' |publisher=Metro|work=Metro|access-date=3 September 2017 | date=26 August 2017}}</ref> The incident represented the largest loss of life as the result of a motorway accident since a [[M40 minibus crash|crash on the M40]] in 1993.<ref name=TOI>{{cite news|url=http://timesofindia.indiatimes.com/nri/other-news/eight-indians-killed-in-worst-uk-road-mishap-in-decades/articleshow/60248985.cms? |title= Eight Indians die in worst UK road crash in 24 years|newspaper=Times of India|date=28 August 2017}}</ref>

==Junctions==
{{GeoGroup|maplink=yes|section=Junctions}}
{{-}}
{| class="plainrowheaders wikitable"
|-
!scope=col|County
!scope=col|Location
!scope=col|mile
!scope=col|{{tooltip|km|Kilometres}}
!scope=col|{{tooltip|Jct|Junction}}
!scope=col|Destinations (SB)
!scope=col|Destinations (NB)
!scope=col|Notes
|-
|rowspan=4|[[Greater London]]
|rowspan=4|[[London Borough of Barnet]]
|style="background:#eaecf0;text-align:right;"|7.0
|style="background:#eaecf0;text-align:right;"|11.3
|style="text-align:center;"|1
|colspan=2|{{jct|country=GBR|A|406|name1=North Circular|city1=Central London|city2=Brent Cross|city3=Wembley}}
|Southern terminus <hr> {{coord|51.5752|N|0.2347|W|dim:4000_region:GB|display=inline|name=M1, Junction 1}}
|-
|style="background:#eaecf0;text-align:right;"|9.1<br />9.2
|style="background:#eaecf0;text-align:right;"|14.6<br />14.8
|style="text-align:center;"|2
|{{jct|country=GBR|A|1|to2=to|A|406|dir2=clockwise|name2=North Circular|city1=City of London|location2=[[Holloway, London|Holloway]]}}
|style="background:#ffdddd" title="Incomplete access"|No access
|style="background:#ffdddd" title="Incomplete access"|Southbound exit and northbound entrance <hr> {{coord|51.6040|N|0.2398|W|dim:4000_region:GB|display=inline|name=M1, Junction 2}}
|-
|style="background:#eaecf0;text-align:right;"|12.0
|style="background:#eaecf0;text-align:right;"|19.3
|style="text-align:center" colspan=3|[[London Gateway services]]
|{{coord|51.63513|N|0.2661|W|dim:4000_region:GB|display=inline|name=M1, London Gateway services}}
|-
|style="background:#eaecf0;text-align:right;"|13.2<br />13.5
|style="background:#eaecf0;text-align:right;"|21.3<br />21.8
|style="text-align:center;"|4
|{{jct|country=GBR|A|41|location1=[[Harrow, London|Harrow]]|city2=Edgware}}
|style="background:#ffdddd" title="Incomplete access"|No access
|style="background:#ffdddd" title="Incomplete access"|Southbound exit and northbound entrance <hr> {{coord|51.6361|N|0.3047|W|dim:4000_region:GB|display=inline|name=M1, Junction 4}}
|-
|rowspan=6|[[Hertfordshire]]
|[[Bushey]]–[[Radlett]] boundary
|style="background:#eaecf0;text-align:right;"|17.1<br />17.5
|style="background:#eaecf0;text-align:right;"|27.5<br />28.1
|style="text-align:center;"|5
|{{jct|country=GBR|A|41|city1=Watford}}
|{{jct|country=GBR|A|41|to2=to|M|25|dir2=anti-clockwise|city1=Aylesbury|city2=Watford}}
|{{coord|51.6716|N|0.3689|W|dim:4000_region:GB|display=inline|name=M1, Junction 5}}
|-
|[[Watford]]–[[Bricket Wood]] boundary
|style="background:#eaecf0;text-align:right;"|19.7<br />20.0
|style="background:#eaecf0;text-align:right;"|31.7<br />32.2
|style="text-align:center;"|6
|{{jct|country=GBR|A|405|city1=North Watford}}
|{{jct|country=GBR|A|405|to2=to|M|25|city1=St Albans}}
|{{coord|51.7060|N|0.3818|W|dim:4000_region:GB|display=inline|name=M1, Junction 6}}
|-
|[[St Stephen, Hertfordshire|St Stephen]]
|style="background:#eaecf0;text-align:right;"|20.4<br />20.8
|style="background:#eaecf0;text-align:right;"|32.9<br />33.5
|style="text-align:center;"|6A
|{{jct|country=GBR|M|25|to2=to|M|11|noshield2=y|M|20|noshield3=y|extra=airport|location1=[[London Stansted Airport|Stansted Airport]]|city2=Dartford}} <br />
{{jct|country=GBR|M|25|to2=to|M|40|noshield2=y|M|4|noshield3=y|M|3|dab4=Great Britain|noshield4=y|extra=airport|location1=[[Heathrow Airport]]}}
|style="background:#ffdddd" title="Incomplete access"|No access
|style="background:#ffdddd" title="Incomplete access"|Southbound exit and northbound entrance <hr> {{coord|51.7183|N|0.3861|W|dim:4000_region:GB|display=inline|name=M1, Junction 6a - M1-M25 interchange}}
|-
|rowspan=2|[[St Michael, Hertfordshire|St Michael]]
|style="background:#eaecf0;text-align:right;"|22.5<br />22.7
|style="background:#eaecf0;text-align:right;"|36.2<br />36.6
|style="text-align:center;"|7
|{{jct|country=GBR|A|414|city1=St Albans|location2=[[Hatfield, Hertfordshire|Hatfield]]}}
|style="background:#ffdddd" title="Incomplete access"|No access
|style="background:#ffdddd" title="Incomplete access"|Southbound exit and northbound entrance <hr> {{coord|51.7493|N|0.4093|W|dim:4000_region:GB|display=inline|name=M1, Junction 7}}
|-
|style="background:#eaecf0;text-align:right;"|23.5<br />23.8
|style="background:#eaecf0;text-align:right;"|37.8<br />38.3
|style="text-align:center;"|8
|colspan=2|{{jct|country=GBR|A|414|city1=Hemel Hempstead}}
|{{coord|51.7570|N|0.4164|W|dim:4000_region:GB|display=inline|name=M1, Junction 8}}
|-
|[[Redbourn]]–[[Flamstead]]–[[Harpenden]] boundary
|style="background:#eaecf0;text-align:right;"|27.9<br />28.3
|style="background:#eaecf0;text-align:right;"|44.9<br />45.6
|style="text-align:center;"|9
|{{jct|country=GBR|A|5183|city1=Redbourn}}
|{{jct|country=GBR|A|5183|city1=St Albans}}
|{{coord|51.8200|N|0.4171|W|dim:4000_region:GB|display=inline|name=M1, Junction 9}}
|-
|rowspan=6|[[Bedfordshire]]
|[[Slip End]]–[[Luton]] boundary
|style="background:#eaecf0;text-align:right;"|30.3<br />30.6
|style="background:#eaecf0;text-align:right;"|48.8<br />49.2
|style="text-align:center;"|10
|colspan=2|{{jct|country=GBR|A|1081|extra=airport|city1=Luton|location2=[[Luton Airport]]}}
|{{coord|51.8540|N|0.4230|W|dim:4000_region:GB|display=inline|name=M1, Junction 10}}
|-
|[[Luton]]
|style="background:#eaecf0;text-align:right;"|33.7<br />34.0
|style="background:#eaecf0;text-align:right;"|54.3<br />54.7
|style="text-align:center;"|11
|colspan=2|{{jct|country=GBR|A|505|city1=Luton|city2=Dunstable}}
|{{coord|51.8935|N|0.4699|W|dim:4000_region:GB|display=inline|name=M1, Junction 11}}
|-
|[[Chalton, Bedfordshire|Chalton]]
|style="background:#eaecf0;text-align:right;"|
|style="background:#eaecf0;text-align:right;"|
|style="text-align:center;"|11A
|colspan=2|{{jct|country=GBR|A|5|to2=to|A|505|city1=Aylesbury|city2=Dunstable}}
|{{coord|51.9216|N|0.4912|W|dim:4000_region:GB|display=inline|name=M1, Junction 11A}}
|-
|rowspan=2|[[Toddington, Bedfordshire|Toddington]]
|style="background:#eaecf0;text-align:right;"|
|style="background:#eaecf0;text-align:right;"|
|style="text-align:center" colspan=3|[[Toddington services]]
|{{coord|51.9478|N|0.5028|W|dim:4000_region:GB|display=inline|name=M1, Toddington services }}
|-
|style="background:#eaecf0;text-align:right;"|38.5<br />38.9
|style="background:#eaecf0;text-align:right;"|62.0<br />62.6
|style="text-align:center;"|12
|colspan=2|{{jct|country=GBR|A|5120|city1=Flitwick}}
|{{coord|51.9574|N|0.5161|W|dim:4000_region:GB|display=inline|name=M1, Junction 12}}
|-
|[[Husborne Crawley]]–[[Brogborough]] boundary
|style="background:#eaecf0;text-align:right;"|45.2<br />45.4
|style="background:#eaecf0;text-align:right;"|72.7<br />73.1
|style="text-align:center;"|13
|colspan=2|{{jct|country=GBR|A|421|city1=Bedford|city2=Milton Keynes}}
|{{coord|52.0266|N|0.6036|W|dim:4000_region:GB|display=inline|name=M1, Junction 13}}
|-
|rowspan=2|[[Buckinghamshire]]
|[[Broughton, Milton Keynes|Broughton]]–[[Moulsoe]] boundary
|style="background:#eaecf0;text-align:right;"|49.7<br />50.2
|style="background:#eaecf0;text-align:right;"|80.0<br />80.8
|style="text-align:center;"|14
|colspan=2|{{jct|country=GBR|A|509|city1=Milton Keynes|city2=Newport Pagnell}}
|{{coord|52.0588|N|0.7001|W|dim:4000_region:GB|display=inline|name=M1, Junction 14}}
|-
|[[Newport Pagnell]]
|style="background:#eaecf0;text-align:right;"|53.7
|style="background:#eaecf0;text-align:right;"|86.5
|style="text-align:center" colspan=3|[[Newport Pagnell services]]
|{{coord|52.0833|N|0.7485|W|dim:4000_region:GB|display=inline|name=M1, Newport Pagnell services}}
|-
|rowspan=6|[[Northamptonshire]]
|[[Grange Park, Northamptonshire|Grange Park]]
|style="background:#eaecf0;text-align:right;"|61.8<br />62.3
|style="background:#eaecf0;text-align:right;"|99.4<br />100.2
|style="text-align:center;"|15
|colspan=2|{{jct|country=GBR|A|45|A|508|to3=to|A|43|city1=Northampton|city2=Wellingborough|city3=Kettering|location4=Rail Freight Terminal}}
|{{coord|52.1859|N|0.8951|W|dim:4000_region:GB|display=inline|name=M1, Junction 15}}
|-
|[[Rothersthorpe]]
|style="background:#eaecf0;text-align:right;"|64.3<br />64.9
|style="background:#eaecf0;text-align:right;"|103.5<br />104.5
|style="text-align:center;"|15A
|{{jct|country=GBR|A|43|to2=to|M|40|city1=Oxford}} <hr> [[Northampton services]]
|{{jct|country=GBR|A|43|to2=to|M|40|city1=Oxford|city2=Northampton}} <hr> [[Northampton services]]
|{{coord|52.2096|N|0.9444|W|dim:4000_region:GB|display=inline|name=M1, Junction 15a}}
|-
|[[Upper Heyford, Northamptonshire|Upper Heyford]]
|style="background:#eaecf0;text-align:right;"|67.9<br />68.3
|style="background:#eaecf0;text-align:right;"|109.2<br />109.9
|style="text-align:center;"|16
|{{jct|country=GBR|A|4500|city1=Northampton}}
|{{jct|country=GBR|A|45|city1=Daventry}}
|{{coord|52.2303|N|1.0160|W|dim:4000_region:GB|display=inline|name=M1, Junction 16}}
|-
|[[Watford, Northamptonshire|Watford]]
|style="background:#eaecf0;text-align:right;"|75.1
|style="background:#eaecf0;text-align:right;"|120.8
|style="text-align:center" colspan=3|[[Watford Gap services]]
|{{coord|52.3070|N|1.1220|W|dim:4000_region:GB|display=inline|name=M1, Watford Gap services}}
|-
|[[Watford, Northamptonshire|Watford]]–[[Crick, Northamptonshire|Crick]] boundary
|style="background:#eaecf0;text-align:right;"|76.6<br />76.9
|style="background:#eaecf0;text-align:right;"|123.3<br />123.8
|style="text-align:center;"|17
|style="background:#ffdddd" title="Incomplete access"|No access
|{{jct|country=GBR|M|45|city1=Coventry}}
|style="background:#ffdddd" title="Incomplete access"|Northbound exit and southbound entrance <hr> {{coord|52.3244|N|1.1407|W|dim:4000_region:GB|display=inline|name=M1, Junction 17}}
|-
|[[Crick, Northamptonshire|Crick]]
|style="background:#eaecf0;text-align:right;"|78.5<br />78.9
|style="background:#eaecf0;text-align:right;"|126.3<br />126.9
|style="text-align:center;"|18
|{{jct|country=GBR|A|428|to2=to|A|361|city1=Daventry|location2=[[DIRFT]]}}
|{{jct|country=GBR|A|5|to2=to|A|428|city1=Hinckley|location2=[[Rugby, Warwickshire|Rugby]]|location3=[[DIRFT]]}} 
|{{coord|52.3509|N|1.1546|W|dim:4000_region:GB|display=inline|name=M1, Junction 18}}
|-
|rowspan=10|[[Leicestershire]]
|[[Swinford, Leicestershire|Swinford]]<br />([[Catthorpe Interchange]]) 
|style="background:#eaecf0;text-align:right;"|82.3<br />82.7
|style="background:#eaecf0;text-align:right;"|132.4<br />133.1
|style="text-align:center;"|19
|style="background:#ffdddd" title="Incomplete access"|{{jct|country=GBR|A|14|city1=Felixstowe|city2=Kettering}}
|style="background:#ffdddd" title="Incomplete access"|{{jct|country=GBR|M|6|location1=The North West|city2=Birmingham|city3=Coventry}}
|style="background:#ffdddd" title="Incomplete access"|No access to M6 from southbound exit or to A14 from northbound exit <hr> {{coord|52.4052|N|1.1770|W|dim:4000_region:GB|display=inline|name=M1, Junction 19}}
|-
|[[Lutterworth]]–[[Misterton with Walcote]] boundary
|style="background:#eaecf0;text-align:right;"|85.5<br />86.1
|style="background:#eaecf0;text-align:right;"|137.6<br />138.5
|style="text-align:center;"|20
|{{jct|country=GBR|A|4303|to2=to|A|426|city1=Lutterworth|location2=[[Rugby, Warwickshire|Rugby]]}}
|{{jct|country=GBR|A|4303|A|4304|city1=Lutterworth|city2=Market Harborough}}
|{{coord|52.4502|N|1.1915|W|dim:4000_region:GB|display=inline|name=M1, Junction 20}}
|-
|[[Enderby, Leicestershire|Enderby]]–[[Lubbesthorpe]]–[[Braunstone Town]] boundary
|style="background:#eaecf0;text-align:right;"|96.1<br />96.6
|style="background:#eaecf0;text-align:right;"|154.6<br />155.4
|style="text-align:center;"|21
|{{jct|country=GBR|M|69|A|5460|city1=Birmingham|city2=Coventry|city3=Leicester}}
|{{jct|country=GBR|M|69|A|5460|city1=Coventry|city2=Leicester}}
|{{coord|52.6004|N|1.1950|W|dim:4000_region:GB|display=inline|name=M1, Junction 21}}
|-
|[[Leicester Forest East]]
|style="background:#eaecf0;text-align:right;"|97.7
|style="background:#eaecf0;text-align:right;"|157.2
|style="text-align:center" colspan=3|[[Leicester Forest East services]]
|{{coord|52.6192|N|1.2058|W|dim:4000_region:GB|display=inline|name=M1, Leicester Forest East services}}
|-
|[[Kirby Muxloe]]
|style="background:#eaecf0;text-align:right;"|99.3<br />99.5
|style="background:#eaecf0;text-align:right;"|159.8<br />160.1
|style="text-align:center;"|21A
|style="background:#ffdddd" title="Incomplete access"|No access
|{{jct|country=GBR|A|46|city1=Leicester|location2=[[Newark-on-Trent|Newark]]}}
|style="background:#ffdddd" title="Incomplete access"|Northbound exit and southbound entrance <hr> {{coord|52.6358|N|1.2180|W|dim:4000_region:GB|display=inline|name=M1, Junction 21a}}
|-
|[[Markfield]]
|style="background:#eaecf0;text-align:right;"|104.3<br />104.7
|style="background:#eaecf0;text-align:right;"|167.8<br />168.5
|style="text-align:center;"|22
|{{jct|country=GBR|A|50|A|511|city1=Leicester|city2=Coalville}}
|{{jct|country=GBR|A|511|location1=[[Ashby-de-la-Zouch|Ashby]]|city2=Coalville}}
|{{coord|52.6959|N|1.2924|W|dim:4000_region:GB|display=inline|name=M1, Junction 22}}
|-
|[[Shepshed]]
|style="background:#eaecf0;text-align:right;"|108.8<br />109.2
|style="background:#eaecf0;text-align:right;"|175.1<br />175.8
|style="text-align:center;"|23
|colspan=2|{{jct|country=GBR|A|512|city1=Loughborough|city2=Shepshed}}
|{{coord|52.7603|N|1.2739|W|dim:4000_region:GB|display=inline|name=M1, Junction 23}}
|-
|[[Long Whatton and Diseworth]]
|style="background:#eaecf0;text-align:right;"|113.4<br />113.6
|style="background:#eaecf0;text-align:right;"|182.5<br />182.8
|style="text-align:center;"|23A
|style="background:#ffdddd" title="Incomplete access"|{{jct|country=GBR|A|42|to2=to|M|42|location1=The South West|city2=Birmingham}}
|style="background:#ffdddd" title="Incomplete access"|{{jct|country=GBR|A|453|extra=airport|location1=[[East Midlands Airport]]}} <hr> [[Donington Park services]]
|style="background:#ffdddd" title="Incomplete access"|No access to A42 from northbound exit and to A453 from southbound exit <hr> {{coord|52.8193|N|1.3054|W|dim:4000_region:GB|display=inline|name=M1, Junction 23a}}
|-
|rowspan=2|[[Lockington-Hemington]]
|style="background:#eaecf0;text-align:right;"|114.9<br />115.4
|style="background:#eaecf0;text-align:right;"|184.9<br />185.7
|style="text-align:center;"|24
|{{jct|country=GBR|A|453|extra=airport|city1=Nottingham|location2=[[East Midlands Airport]]}} <hr> [[Donington Park services]]
|{{jct|country=GBR|A|50|A|453|location1=[[Stoke-on-Trent|Stoke]]|city2=Derby|city3=Nottingham}}
|{{coord|52.8440|N|1.2957|W|dim:4000_region:GB|display=inline|name=M1, Junction 24}}
|-
|style="background:#eaecf0;text-align:right;"|115.8<br />116.2
|style="background:#eaecf0;text-align:right;"|186.3<br />187.0
|style="text-align:center;"|24A
|{{jct|country=GBR|A|50|location1=[[Stoke-on-Trent|Stoke]]|city2=Derby}}
|style="background:#ffdddd" title="Incomplete access"|No access
|style="background:#ffdddd" title="Incomplete access"|No exit from northbound traffic (use Junction 24) <hr> {{coord|52.8580|N|1.3011|W|dim:4000_region:GB|display=inline|name=M1, Junction 24a}}
|-
|[[Derbyshire]]
|[[Sandiacre]]
|style="background:#eaecf0;text-align:right;"|120.0<br />120.5
|style="background:#eaecf0;text-align:right;"|193.2<br />193.9
|style="text-align:center;"|25
|colspan=2|{{jct|country=GBR|A|52|city1=Nottingham|city2=Derby}}
|{{coord|52.9159|N|1.2997|W|dim:4000_region:GB|display=inline|name=M1, Junction 25}}
|-
|rowspan=3|[[Nottinghamshire]]
|[[Trowell]]
|style="background:#eaecf0;text-align:right;"|124.1
|style="background:#eaecf0;text-align:right;"|199.8
|style="text-align:center" colspan=3|[[Trowell services]]
|{{coord|52.9622|N|1.2673|W|dim:4000_region:GB|display=inline|name=M1, Trowell services}}
|-
|[[Nuthall]]
|style="background:#eaecf0;text-align:right;"|126.0<br />126.6
|style="background:#eaecf0;text-align:right;"|202.8<br />203.7
|style="text-align:center;"|26
|{{jct|country=GBR|A|610|city1=Nottingham}}
|{{jct|country=GBR|A|610|city1=Nottingham|location2=[[Ripley, Derbyshire|Ripley]]}}
|{{coord|52.9899|N|1.2346|W|dim:4000_region:GB|display=inline|name=M1, Junction 26}}
|-
|[[Felley]]–[[Annesley]] boundary
|style="background:#eaecf0;text-align:right;"|131.5<br />132.0
|style="background:#eaecf0;text-align:right;"|211.7<br />212.4
|style="text-align:center;"|27
|{{jct|country=GBR|A|608|city1=Heanor|city2=Hucknall}}
|{{jct|country=GBR|A|608|city1=Mansfield}}
|{{coord|53.0634|N|1.2691|W|dim:4000_region:GB|display=inline|name=M1, Junction 27}}
|-
|rowspan=5|[[Derbyshire]]
|[[Pinxton]]–[[South Normanton]] boundary
|style="background:#eaecf0;text-align:right;"|135.0<br />135.5
|style="background:#eaecf0;text-align:right;"|217.2<br />218.0
|style="text-align:center;"|28
|{{jct|country=GBR|A|38|to2=to|A|615|city1=Derby|location2=[[Matlock, Derbyshire|Matlock]]}}
|{{jct|country=GBR|A|38|to2=to|A|615|city1=Mansfield|location2=[[Matlock, Derbyshire|Matlock]]}}
|{{coord|53.1013|N|1.3240|W|dim:4000_region:GB|display=inline|name=M1, Junction 28}}
|-
|[[Tibshelf]]
|style="background:#eaecf0;text-align:right;"|138.3
|style="background:#eaecf0;text-align:right;"|222.5
|style="text-align:center" colspan=3|[[Tibshelf services]]
|{{coord|53.1385|N|1.3309|W|dim:4000_region:GB|display=inline|name=M1, Tibshelf services}}
|-
|[[Heath, Derbyshire|Heath]]
|style="background:#eaecf0;text-align:right;"|141.7<br />142.3
|style="background:#eaecf0;text-align:right;"|228.1<br />229.0
|style="text-align:center;"|29
|{{jct|country=GBR|A|617|to2=to|A|632|city1=Mansfield|location2=[[Matlock, Derbyshire|Matlock]]}}
|{{jct|country=GBR|A|617|location1=[[Chesterfield, Derbyshire|Chesterfield]]}}
|{{coord|53.1977|N|1.3229|W|dim:4000_region:GB|display=inline|name=M1, Junction 29}}
|-
|[[Duckmanton]]
|style="background:#eaecf0;text-align:right;"|
|style="background:#eaecf0;text-align:right;"|
|style="text-align:center;"|29A
|colspan=2|{{jct|country=GBR|A|6192|to2=to|A|632|location1=Markham Vale|city2=Bolsover}}
|{{coord|53.2465|N|1.3311|W|dim:4000_region:GB|display=inline|name=M1, Junction 29a}}
|-
|[[Barlborough]]
|style="background:#eaecf0;text-align:right;"|148.4<br />148.8
|style="background:#eaecf0;text-align:right;"|238.9<br />239.5
|style="text-align:center;"|30
|{{jct|country=GBR|A|616|to2=to|A|619|location1=[[Newark-on-Trent|Newark]]|location2=[[Chesterfield, Derbyshire|Chesterfield]]}}
|{{jct|country=GBR|A|6135|to2=to|A|619|city1=Sheffield|city2=Worksop}}
|{{coord|53.2865|N|1.2960|W|dim:4000_region:GB|display=inline|name=M1, Junction 30}}
|-
|rowspan=10|[[South Yorkshire]]
|[[Woodall, South Yorkshire|Woodall]]
|style="background:#eaecf0;text-align:right;"|151.3
|style="background:#eaecf0;text-align:right;"|243.5
|style="text-align:center" colspan=3|[[Woodall services]]
|{{coord|53.3155|N|1.2821|W|dim:4000_region:GB|display=inline|name=M1, Woodall services}}
|-
|[[Aston, South Yorkshire|Aston]]–[[Todwick]] boundary
|style="background:#eaecf0;text-align:right;"|153.8<br />154.2
|style="background:#eaecf0;text-align:right;"|247.5<br />248.2
|style="text-align:center;"|31
|{{jct|country=GBR|A|57|city1=Worksop}}
|{{jct|country=GBR|A|57|city1=Sheffield|city2=Rotherham}}
|{{coord|53.3622|N|1.2835|W|dim:4000_region:GB|display=inline|name=M1, Junction 31}}
|-
|[[Thurcroft]]–[[Morthen]] boundary
|style="background:#eaecf0;text-align:right;"|156.3<br />156.6
|style="background:#eaecf0;text-align:right;"|251.6<br />252.1
|style="text-align:center;"|32
|{{jct|country=GBR|M|18|location1=The North|city2=Doncaster|location3=[[Kingston-upon-Hull|Hull]]}}
|{{jct|country=GBR|M|18|location1=The North|city2=Doncaster|location3=[[Kingston-upon-Hull|Hull]]|city4=Rotherham}}
|{{coord|53.3916|N|1.2823|W|dim:4000_region:GB|display=inline|name=M1, Junction 32 - M1-M18 interchange}}
|-
|[[Treeton]]– [[Brinsworth]] boundary
|style="background:#eaecf0;text-align:right;"|158.8<br />159.2
|style="background:#eaecf0;text-align:right;"|255.6<br />256.2
|style="text-align:center;"|33
|colspan=2|{{jct|country=GBR|A|630|city1=Sheffield|city2=Rotherham}}
|{{coord|53.3985|N|1.3498|W|dim:4000_region:GB|display=inline|name=M1, Junction 33}}
|-
|[[Sheffield]]
|style="background:#eaecf0;text-align:right;"|161.5<br />161.7
|style="background:#eaecf0;text-align:right;"|259.9<br />260.3
|style="text-align:center;"|34
|{{jct|country=GBR|A|6109|city1=Sheffield|city2=Rotherham|location3=[[Meadowhall (shopping centre)|Meadowhall]]}}
|{{jct|country=GBR|A|6178|city1=Sheffield|city2=Rotherham|location3=[[Meadowhall (shopping centre)|Meadowhall]]}}
|{{coord|53.4175|N|1.4063|W|dim:4000_region:GB|display=inline|name=M1, Junction 34}}
|-
|[[Sheffield]]–[[Thorpe Hesley]] boundary
|style="background:#eaecf0;text-align:right;"|164.9<br />165.4
|style="background:#eaecf0;text-align:right;"|265.4<br />266.2
|style="text-align:center;"|35
|colspan=2|{{jct|country=GBR|A|629|city1=Rotherham}}
|{{coord|53.4558|N|1.4454|W|dim:4000_region:GB|display=inline|name=M1, Junction 35}}
|-
|[[Sheffield]]–[[Tankersley, South Yorkshire|Tankersley]] boundary
|style="background:#eaecf0;text-align:right;"|166.7<br />166.9
|style="background:#eaecf0;text-align:right;"|268.2<br />268.6
|style="text-align:center;"|35A
|style="background:#ffdddd" title="Incomplete access"|No access
|{{jct|country=GBR|A|616|city1=Manchester}}
|style="background:#ffdddd" title="Incomplete access"|Northbound exit and southbound entrance <hr> {{coord|53.4753|N|1.4589|W|dim:4000_region:GB|display=inline|name=M1, Junction 35a}}
|-
|[[Tankersley, South Yorkshire|Tankersley]]–[[Hoyland]]–[[Birdwell, South Yorkshire|Birdwell]] boundary
|style="background:#eaecf0;text-align:right;"|168.0<br />168.5
|style="background:#eaecf0;text-align:right;"|270.3<br />271.2
|style="text-align:center;"|36
|{{jct|country=GBR|A|61|city1=Sheffield|city2=Barnsley}}
|{{jct|country=GBR|A|61|city1=Barnsley}}
|{{coord|53.4963|N|1.4755|W|dim:4000_region:GB|display=inline|name=M1, Junction 36}}
|-
|[[Dodworth]]–[[Barnsley]] boundary
|style="background:#eaecf0;text-align:right;"|172.1<br />172.6
|style="background:#eaecf0;text-align:right;"|276.9<br />277.8
|style="text-align:center;"|37
|colspan=2|{{jct|country=GBR|A|628|city1=Manchester|city2=Barnsley}}
|{{coord|53.5482|N|1.5157|W|dim:4000_region:GB|display=inline|name=M1, Junction 37}}
|-
|[[Haigh, South Yorkshire|Haigh]]
|style="background:#eaecf0;text-align:right;"|176.4<br />176.9
|style="background:#eaecf0;text-align:right;"|283.9<br />284.7
|style="text-align:center;"|38
|colspan=2|{{jct|country=GBR|A|637|city1=Huddersfield}}
|{{coord|53.6030|N|1.5509|W|dim:4000_region:GB|display=inline|name=M1, Junction 38}}
|-
|rowspan=11|[[West Yorkshire]]
|[[West Bretton]]–[[Woolley, West Yorkshire|Woolley]] boundary
|style="background:#eaecf0;text-align:right;"|178.5
|style="background:#eaecf0;text-align:right;"|287.2
|style="text-align:center" colspan=3|[[Woolley Edge services]]
|{{coord|53.6216|N|1.5482|W|dim:4000_region:GB|display=inline|name=M1, Woolley Edge services}}
|-
|[[Calder Grove]]–[[Durkar]] boundary
|style="background:#eaecf0;text-align:right;"|179.9<br />180.4
|style="background:#eaecf0;text-align:right;"|289.5<br />290.4
|style="text-align:center;"|39
|{{jct|country=GBR|A|636|city1=Denby Dale}}
|{{jct|country=GBR|A|636|city1=Wakefield}}
|{{coord|53.6506|N|1.5287|W|dim:4000_region:GB|display=inline|name=M1, Junction 39}}
|-
|[[Ossett]]–[[Wakefield]] boundary
|style="background:#eaecf0;text-align:right;"|182.6<br />183.0
|style="background:#eaecf0;text-align:right;"|293.8<br />294.5
|style="text-align:center;"|40
|colspan=2|{{jct|country=GBR|A|638|city1=Wakefield|city2=Dewsbury}}
|{{coord|53.6836|N|1.5551|W|dim:4000_region:GB|display=inline|name=M1, Junction 40}}
|-
|[[East Ardsley]]
|style="background:#eaecf0;text-align:right;"|185.1<br />185.6
|style="background:#eaecf0;text-align:right;"|297.9<br />298.7
|style="text-align:center;"|41
|{{jct|country=GBR|A|650|city1=Wakefield|location2=[[Morley, West Yorkshire|Morley]]}}
|{{jct|country=GBR|A|650|city1=Wakefield}}
|{{coord|53.7156|N|1.5353|W|dim:4000_region:GB|display=inline|name=M1, Junction 41}}
|-
|[[Lofthouse, West Yorkshire|Lofthouse]]–[[Robin Hood, West Yorkshire|Robin Hood]]–[[Leeds]] boundary
|style="background:#eaecf0;text-align:right;"|186.5<br />187.0
|style="background:#eaecf0;text-align:right;"|300.1<br />301.0
|style="text-align:center;"|42
|{{jct|country=GBR|M|62|dir1=west|city1=Manchester|city2=Bradford}} <br /> {{jct|country=GBR|M|62|dir1=east|location1=[[Kingston upon Hull|Hull]]|city2=Pontefract}}
|{{jct|country=GBR|M|62|dir1=west|extra=airport|city1=Manchester|city2=Bradford|location3=[[Leeds Bradford Airport]]}} <br /> {{jct|country=GBR|M|62|dir1=east|location1=[[Kingston upon Hull|Hull]]}}
|{{coord|53.7309|N|1.5120|W|dim:4000_region:GB|display=inline|name=M1, Junction 42 - M1-M62 interchange}}
|-
|rowspan=2|[[Rothwell, West Yorkshire|Rothwell]]–[[Leeds]] boundary
|style="background:#eaecf0;text-align:right;"|188.4<br />189.0
|style="background:#eaecf0;text-align:right;"|303.2<br />304.1
|style="text-align:center;"|43
|style="background:#ffdddd" title="Incomplete access"|No access
|{{jct|country=GBR|M|621|city1=Leeds}}
|style="background:#ffdddd" title="Incomplete access"|Northbound exit and southbound entrance <hr> {{coord|53.7546|N|1.5146|W|dim:4000_region:GB|display=inline|name=M1, Junction 43}}
|-
|style="background:#eaecf0;text-align:right;"|189.4<br />189.9
|style="background:#eaecf0;text-align:right;"|304.8<br />305.6
|style="text-align:center;"|44
|{{jct|country=GBR|A|639|to2=to|M|621|city1=Leeds}}
|{{jct|country=GBR|A|639|city1=Leeds}}
|{{coord|53.7626|N|1.4914|W|dim:4000_region:GB|display=inline|name=M1, Junction 44}}
|-
|[[Leeds]]
|style="background:#eaecf0;text-align:right;"|190.8<br />191.2
|style="background:#eaecf0;text-align:right;"|307.1<br />307.7
|style="text-align:center;"|45
|colspan=2|{{jct|country=GBR|A|63|city1=Leeds}} <hr> [[Skelton Lake services]]
|{{coord|53.7761|N|1.4704|W|dim:4000_region:GB|display=inline|name=M1, Junction 45}}
|-
|[[Leeds]]–[[Garforth]] boundary
|style="background:#eaecf0;text-align:right;"|193.7<br />194.0
|style="background:#eaecf0;text-align:right;"|311.7<br />312.2
|style="text-align:center;"|46
|{{jct|country=GBR|A|6120|city1=Leeds}}
|{{jct|country=GBR|A|6120|A|63|extra=airport|city1=Leeds|location2=[[Leeds Bradford Airport]]|city3=Selby}}
|{{coord|53.7920|N|1.4265|W|dim:4000_region:GB|display=inline|name=M1, Junction 46}}
|-
|[[Garforth]]
|style="background:#eaecf0;text-align:right;"|196.6<br />197.0
|style="background:#eaecf0;text-align:right;"|316.4<br />317.1
|style="text-align:center;"|47
|{{jct|country=GBR|A|656|A|642|city1=Castleford|city2=Garforth}}
|{{jct|country=GBR|A|642|to2=to|AM|1|city1=Garforth|location2=The South}}
|{{coord|53.8056|N|1.3615|W|dim:4000_region:GB|display=inline|name=M1, Junction 47}}
|-
|[[Micklefield]]–[[Lotherton cum Aberford]] boundary
|style="background:#eaecf0;text-align:right;"|197.7
|style="background:#eaecf0;text-align:right;"|318.1
|style="text-align:center;"|-

|colspan=2|{{jct|country=GBR|AM|1|location1=The North|city2=Wetherby}}
|Northern terminus <hr> {{coord|53.8218|N|1.3387|W|dim:4000_region:GB|display=inline|name=M1, Northern terminus with A1(M)}}
|-
|colspan=8|'''Notes'''
* Data from [[Driver location signs|driver location signs/distance marker posts]] are used to provide distance and carriageway identification information. Where a junction spans several hundred metres and the data is available, both the start and finish values for the junction are shown. Coordinate data from ACME Mapper.
|-
|colspan=8 style="background:#eaecf0;text-align:center;"| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi <br /> {{resize|{{legend|#ffdddd|[[Interchange (road)#Complete and incomplete interchanges|Incomplete access]]}}}}
|}

==See also==
* [[List of motorways in the United Kingdom]]

==References==
{{Reflist}}

==External links==
{{OSM relation|1559914|M1 motorway|link=yes}}
{{GeoGroup}}
{{Attached KML|display=inline,title}}
* [http://www.highways.gov.uk/our-road-network/our-network/key-roads/m1/ Highways Agency]
* The Motorway Archive:
** [https://web.archive.org/web/20021104195212/http://www.iht.org/motorway/m1m10m45.htm Hendon to Crick]
** [https://web.archive.org/web/20090812124322/http://www.iht.org/motorway/m1cricdonc.htm Crick to Doncaster]
** [https://web.archive.org/web/20070311003156/http://www.iht.org/motorway/m1introduction.htm Aston to Leeds]
** [https://web.archive.org/web/20070311002729/http://www.iht.org/motorway/m1m18barlwad.htm M1/M18]
** [https://web.archive.org/web/20120207182418/http://www.iht.org/motorway/m1extension.htm M1 extension to A1(M)]
* [http://www.bbc.co.uk/northamptonshire/asop/northampton/m1.shtml BBC website ''The Backbone of Britain'' contains link to a video of 2'42" in length]
* [https://www.youtube.com/watch?v=G8iLRrt_4Jw ''Major Road Ahead''] by the [[John Laing plc|John Laing Film Unit]], showing construction of the first section

{{UK motorways}}
{{Motorways and Trunk Roads in England}}
{{Transport in Buckinghamshire}}
{{Transport in Bedfordshire}}
{{Roads in London}}
{{Authority control}}

[[Category:M1 motorway| ]]
[[Category:Motorways in England|1-0001m]]
[[Category:Transport in the London Borough of Barnet]]
[[Category:Roads in Bedfordshire]]
[[Category:Roads in Buckinghamshire]]
[[Category:Roads in Hertfordshire]]
[[Category:Transport in Leicestershire]]
[[Category:Motorways in London|1-0001m]]
[[Category:Transport in Northamptonshire]]
[[Category:Roads in Nottinghamshire]]
[[Category:Transport in South Yorkshire]]
[[Category:Transport in West Yorkshire]]
[[Category:Roads in Sheffield]]
[[Category:Transport in Derbyshire]]
[[Category:Transport infrastructure completed in 1959]]