Question to the Department for Transport:

To ask the Secretary of State for Transport, how many and what proportion of incidents in which a vehicle became stranded in a live lane of an all-lane running motorway did detection take more than (a) five and (b) ten minutes in 2022.

National Highways identifies stopped vehicles through various sources including being notified by the police, public, stopped vehicle detection (SVD) technology where in place, recovery industry and its traffic officers.

To monitor the performance of SVD National Highways sample operational data.

Based on the latest operational data, National Highways detects around two thirds of identified stopped vehicles within 20 seconds and this rises to almost 90% within 60 seconds.

This data also shows almost all stopped vehicles identified by SVD technology were detected within five minutes, excluding very few instances which were deemed to be false alerts.