Editing M1 motorway (section)

===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}}