Question to the Department for Transport:
To ask the Secretary of State for Transport, what assessment her Department has made of the comparative effectiveness of filling potholes and preventative maintenance measures in the long-term.
Local highway authorities have a duty under Section 41 of the Highways Act 1980 to maintain the public highway network in their area. The Act does not set out specific standards for maintenance, as it is for each individual local highway authority to assess which parts of its network need repair and what standards should be applied, based upon their local knowledge and circumstances.
The Department does not gather information from local highway authorities about the causes or recurrence of individual potholes. There are occasions where potholes need to be repaired quickly for safety reasons, but the Department encourages local authorities to focus on long-term preventative maintenance, which is more cost-effective than the reactive patching of potholes.
This is a core aspect of the Code of Practice for Well-managed highways infrastructure, which states that “when determining the balance between preventative and reactive maintenance, authorities should adopt the principle that prevention is better than cure”. This is available online, at: https://www.ciht.org.uk/ukrlg-home/code-of-practice/.
The Government is also encouraging local highways authorities to take a long-term preventative approach by making some of their funding conditional on meeting certain best practiced criteria. To qualify for their full share of this financial year's £500m uplift in highways maintenance funding, local authorities had to publish transparency reports and set out how they comply with best practice, for example in relation to the extent to which they prioritise preventative maintenance. In this context, the Department for Transport wrote to all local highway authorities in England in December to inform them whether they would be receiving their full funding uplift, and emphasised the importance of following the guidance set out in the Code of Practice with regard to preventative maintenance.
The findings from the transparency reports will enable the department to identify where extra support may be needed to ensure compliance with best practice. The department will set out more detail on the further support and training it will make available to local authorities in due course.
Finally, regarding analysis of the effectiveness of preventative maintenance approaches, in November 2024 the Department for Transport published an Economic Appraisal of Investing in Local Highway maintenance. The analysis found that proactive maintenance can be more cost effective. In contrast, reactive maintenance was shown to be less cost-effective and associated with higher long-term expenditure. This report can be accessed at: