S30135 Impulse Geophysics Surveys

This additional work order is required to deliver an updated, network wide survey of ageing concrete road surfaces across the Strategic Road Network, many of which are now reaching the end of their design life and present increasing risk if not properly understood and managed. The current data used to plan maintenance and renewals is outdated due to network changes and previous works, meaning decisions could otherwise be made on incomplete or inaccurate information. This commission will provide a consistent, up to date picture of road condition using proven survey methods (including radar and visual inspections), enabling informed, evidence based decisions on where repairs or full reconstruction are most urgently needed, helping to prevent asset failure and minimise safety risks to road users.

It is also critical that this is delivered as a single coordinated programme using the same methodology as previous surveys to ensure data consistency and avoid inefficiencies, delays, and fragmented information that would weaken strategic planning and increase long term costs. Timely delivery (targeting completion of surveys by October 2026) is essential to support upcoming investment and maintenance programmes and maintain safe, reliable operation of the network.