Scientists have successfully tested an unprecedented technology for containing flooding or dangerous gases in mass transit tunnels: a giant plug. Twenty years ago in Chicago, a small leak in an unused ...

Authorities in the northeastern U.S. investigating flood-barrier technologies to block future flooding in subway tunnels have high hopes for one new device. A pressurized tunnel plug, tested this ...

After Hurricane Sandy decimated the subway system last year, officials pledged to install new devices to help halt the rising tides—including flood gates and, more ...

Numerous metropolitan subway systems around the country include spans that pass under bodies of water. If one of those lines were to spring a leak, the resulting flooding could be catastrophic. The ...

Twenty years ago in Chicago, a small leak in an unused freight tunnel expanded beneath the Windy City and started a flood which eventually gushed through the entire tunnel system. A quarter-million ...