Possibility of building a mountain tunnel

Possibility of building a tunnel through the mountain hills. A TBM (Tunnel Boring Machine) would be required to dig and build a mountain tunnel. During its operation, it will be necessary to provide some building materials for the construction of the tunnel lining. TBM will need to be connected to a conveyor belt for delivering materials for tunnel construction and another a conveyor belt for receiving the excavated material. A TBM Extension enables the building of a longer tunnel.

Already a requested feature. Maybe now possible with the help of bridges logic. Not that necessary though, nothing excavators cannot solve by just making way through.