The Rogfast project in Norway is a 16.5-mile-long underground tunnel lying 392 metres (1,300ft) underneath the seabed.

As the Packers were running out of the tunnel before the game, it was a sea of yellow and green until a red, white and blue jersey popped out of the tunnel face-to-face with Packers cornerback ...

Mechanism: A Gripper TBM uses a rotating cutterhead equipped with disc cutters that apply significant pressure (up to 32 tonnes per disc) against the tunnel face. The machine’s design includes gripper ...