The twin arch ‘M’ shape structure design is more efficient than the standard box structure, reducing the amount of concrete used.
More than five thousand giant concrete tunnel segments will be made by Stanton Precast in Ilkeston before being assembled by Matière.
The completed tunnel will then be covered by earth, with trees, shrubs and hedgerows planted to fit in with the surrounding countryside.
Tunnel construction is expected to be complete in 2024.
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