Then we're told to get out of the cramped carriage and we find ourselves next to the large boring machine.

BBC: London's underground boring renaissance

When crews prepared to drill the giant new cavity under Second Avenue, they first had to freeze the ground to about minus 20 degrees so as not to destabilize the buildings above as the boring machine cut through.

NPR: New York Expanding Nation's Biggest Transit Hub

Bureaucratic systems and processes were put in place to make the system tick over like a boring clockwork machine.

FORBES: Gasp! Machines Still Can't Think!