Question to the Department for Transport:

To ask the Secretary of State for Transport, if she will make a comparative estimate of the potential reduction in local noise pollution on the M25 in Runnymede and Weybridge constituency by (a) repairing the sections of concrete motorway and (b) replacing the concrete with another road surface.

National Highways has already undertaken trials to monitor the noise generated by concrete road surfaces following surface treatments (including Next Generation Concrete Surfacing) and the noise generated by other types of road surface. The outcome of the trials indicated that using low noise surface material versus Next Generation Concrete Surfacing does not result in a materially different amount of noise.

Due to the cost and disruption, replacing the existing sections of concrete road surface in the Runnymede and Weybridge constituency with a low-noise material is not being pursued until it is required (predicted to be after 2040). However, Next Generation Concrete Surfacing will be undertaken across the M25 from 2026 to 2039.