Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment she has made of the implications of electric vehicle uptake for long-term road maintenance costs.

The Government recognises that heavier vehicles can accelerate road surface wear. While we have not undertaken a specific assessment of this effect, we are actively considering the implications of introducing zero-emission heavy goods vehicles, including the potential for additional road wear.

The increasing weight of all road vehicles, both electric vehicles (EVs) and their petrol and diesel counterparts, is one of many factors affecting the condition of our roads. While EVs tend to be heavier than their equivalent petrol or diesel counterpart, on average all passenger cars have been increasing in weight for many years. This trend has been driven by consumer choice and improving safety features for passengers. It is the much heavier commercial vehicles, rather than passenger vehicles, that cause the most wear and tear to road surfaces and other highway structures.

More broadly, there are many reasons why loadings on local roads may change, such as commercial development increasing traffic and the number of heavier vehicles on a road. Because of this, guidance for local authorities already highlights the need for maintenance plans to account for changes in circumstances. The main guidance for local highway authorities on asset management is the Code of Practice for Well-Managed Highways Infrastructure, published by the UK Roads Leadership Group and funded by the Department for Transport. The guidance sets out a national framework for how local highway authorities should manage their networks using a risk-based, evidence-led approach, taking account of current and expected highways usage.