Question to the Department for Transport:

To ask the Secretary of State for Transport, what data her Department holds on trends in the average number of vehicles on the roads from 2000 onwards.

Information on the volume of traffic on roads across Great Britain is collected and published by the Department here https://www.gov.uk/government/collections/road-traffic-statistics.

The data held by the Department for 2000 to 2025 showed that 342.6 billion vehicle miles were travelled on Great Britain’s roads in 2025, compared to 289.6 billion miles in 2000.