BART officials warned the head of the Valley Transportation Authority in 2017 that the single-bore tunnel design now ...

Construction has just completed on the 14-mile (23-kilometer) Desheng tunnel—China's longest single bore, double-track tunnel ...

Cross-border services between Italy and France via the Fréjus tunnel in the French Alps are set to resume on March 31.

Caption This is the inside of the North Bore service tunnel to the Huguenot tunnel in the Du Toits Kloof mountains in the Western Cape, South Africa. An engineering feasibility study will ...