VIDEO: The Zipper truck builds tunnels in no time without any adhesive
VIDEOS: Drone footage shows progress from 4 angles at $1.27B Ohio River East End Crossing project
Rare design has crews working inside a tunnel to make bridge repairs in Michigan
Dangerous tunnel 'game' ends in vehicular crash, multiple injuries
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Tunnel-boring machine Big Bertha moves forward 2 feet in test run to see if blockage is fully removed
No. 6 in 2013: Big Bertha digs in before being stopped in her tracks
Subway expansion in Delhi to set record with simultaneous use of 34 tunnel-boring machines