A desktop survey of drainage asset condition and deterioration modelling identified sections of carriageway on the M1, A1 & A46 that had a poor drainage condition with high severity flooding events, producing evidence to support the need.
The information was provided to the asset team, alongside a programme and proposed costs, supporting the VM (Value Management) 3D Passport Stage Gate process.
Following ‘sign-off’ from the client, the works were mobilised in two weeks. Several survey and jetting crews completed the scheme in 28 shifts, removing 604 safety critical defects from a carriageway length of 40,000m on the strategic road network.
