Question to the Department for Transport:

To ask the Secretary of State for Transport, with reference to her Department's document, the Methodology used to calculate ratings for local road maintenance, published on 11 January 2025, why was metric 9 on decarbonisation of road maintenance deemed relevant to fixing potholes and road conditions; and what assessment has been made of the reliability of electric battery powered highway maintenance vehicles in very cold weather.

Metric 9 considers both whether a local highway authority has plans to decarbonise its maintenance operations and whether it has plans to increase climate resilience.

In relation to decarbonisation, lower carbon approaches to road maintenance, such as a greater focus on preventative treatments, are associated with better whole-life asset management. By treating roads preventatively before they require end-of-life replacement, local highway authorities can keep roads in good conditions for longer and prevent potholes, while also reducing costs and carbon emissions.

In relation to climate resilience, extreme weather events such as the heavy rainfalls of the beginning of this year or the heatwaves experienced over recent summers can accelerate road deterioration. Adapting roads so they better withstand these stresses, for example by improving drainage systems and using heat-durable materials, helps to maintain good road conditions.

It is for each local highway authority to determine which vehicles to use as part of its maintenance operation. As part of the Department's highways innovation programme, Live Labs 2, local authority-led consortia are trialling innovative road maintenance techniques and this includes the use of battery electric powered machinery. The delivery of Live Labs 2 is coordinated by the Association of Directors of Environment, Economy, Planning & Transport (ADEPT) and they will publish the programme's findings once trials have concluded.