A colossal project to reduce traffic in the underground tunnels connecting the Virginia cities of Norfolk and Hampton just had a big breakthrough — literally. Since 1957, the two cities have been ...

TBM Karen will excavate the second bore of the 4.5-mile Euston Tunnel.

Linghang, better known as the world’s largest-diameter high-speed railway shield tunneling machine, crossed the 6.2-mile (10,000-meter) tunneling milestone on Tuesday, as reported by the China Media ...

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Workers at the Seattle waterfront switched on the power to the world’s largest boring machine and revved it forward early Tuesday, bringing hope to the Highway 99 tunnel project after a two-year delay ...