The elevated section of the M5 motorway between junction one and two is one of the busiest routes in the country

Work is due to start after Easter on the two-year project which will see the deck slab removed on a 1.5 mile stretch of the motorway.

Initially work will start by removing the surface on the southbound carriageway to investigate the condition of the concrete underneath.

Once this is complete the damaged concrete will be repaired and a new waterproofing layer applied. This will then be repeated on the northbound carriageway.

Highways England delivery manager, Colin Jackson, said: “We will be starting work on a major concrete repair and waterproofing scheme at the Oldbury viaduct, between junctions 1 and 2 of the M5 in the West Midlands, after Easter.

“At a cost in excess of £100m Highways England is delivering a huge investment that will support economic growth locally and in the wider West Midlands.”