Durkin utilizes the falling weight deflectometer (FWD), an essential tool in civil engineering, particularly for assessing pavement conditions in Australia. This non-destructive testing device measures the deflection of pavements under a controlled load, providing vital data on structural capacity and performance. It is commonly used for highways, local roads, and airport runways. The FWD generates accurate measurements that inform decisions regarding pavement rehabilitation and overlay design, ensuring longevity and safety.