Norway is building the world’s longest and deepest underwater tunnel, one of Europe’s most ambitious engineering projects which is hoped will boost the country’s transport links and infrastructure.

Norway is quietly attempting one of the most ambitious road projects on the planet, driving a multi-lane highway deep under the North Sea to knit its fragmented west coast closer together. The Rogfast ...

The world’s longest and deepest undersea road tunnel is being built in Norway, intended to cut travel time between major cities and become part of a ferry-free highway along its western coast. The ...