To ask the Secretary of State for Transport, with reference to question 95755 of 1 December on 30mph speed limits, what assessment she has made of changes in the levels of adherence to 30mph speed limits over the past 70 years.
The Department for Transport produces an annual publication on speed compliance here: Vehicle speed compliance statistics for Great Britain: 2024 - GOV.UK based on speeds recorded at Automated Traffic Counter sites. 
Road Signs and Markings: Speed Limits