Acciona-Ghella holds a design-build-finance contract for the subway extension.

The project will connect more than four million Buenos Aires citizens to sewers via a network of collector tunnels, a wastewater treatment plant and an outfall.

To create the world’s longest rail tunnel, crews pierce beneath the Alps’ rocky peaks and install a challenging underpass below an alpine river

Two pairs of double-shield tunnel-boring machines break the mold in shaping Norway’s new high-speed railroad between Oslo and Ski.

Trenchless tunneling system for power cables boasts drive distances over one kilometer.

While the president wants his wall, U.S. Customs and Border Protection agents keep finding subterranean tunnels crossing the U.S. border with Mexico.

Researchers push to introduce artificial intelligence and other high-tech features to maximize performance of tunnel-boring machines

The Virginia Dept. of Transportation is seeking requests for qualifications to build the Hampton Roads Bridge-Tunnel Expansion. 

Now that 17 years of construction to build the world’s longest tunnel is ramping down, a massive project to expand Alpine infrastructure soon will launch.