Written Question·Department for Transport·UIN 112271

Speed Limits

Tabled: 10 February 2026

Answered: 17 February 2026

Question

Lisa Smart

To ask the Secretary of State for Transport, whether her Department has conducted analysis of 20mph zones introduced across different localities in England comparing their impact on number of incidents, serious injuries and fatalities; and whether her Dep

Answer

Lilian Greenwood

The Department’s comprehensive three-year evaluation of the effect of 20mph signed-only limits was published on 22 November 2018. It substantially strengthened the evidence base on perceptions, speeds and early outcomes associated with 20mph speed limits....

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