Question to the Department for Transport:

To ask the Secretary of State for Transport, what estimate he has made of the number of days in each of the past three years on which one or more electrical signs on any motorway in England have failed to work.

National Highways operates a large number of electronic signs for purposes including setting speed limits, closing lanes and providing information to road users. National Highways holds data on the percentage of time that roadside technology is operable rather than the number of days each device has failed to work. For the operating period April 2020 to March 2021, message Sign availability was 99.61%.