mountain tunnel

Through the ridge

A mountain tunnel is a passage excavated through a mountain rather than around it, allowing roads or railways to pass directly through terrain that would otherwise require lengthy detours or dangerous high-altitude routes: The mountain tunnel cut two hours off the journey.

Construction typically involves boring through solid rock, making these among the most challenging engineering projects.

Related

drilling · darkness · headlights · echo · alpine · railway · ventilation · fresh air · emergency exit · rock · blast · subway · Mont Blanc · Swiss Alps · shaft · concrete · emerge · burrow

Categories
Opposites
route engineering approach

mountain tunnelmountain pass

Route through highlands

switchback · hairpin turn · col · serpentine road · cliff road

visibility and exposure

mountain tunnelopen highway

natural vs. constructed passage

mountain tunnelmountain pass

Route through highlands

saddle · col · gorge · natural corridor

Family

mountain, tunnel, mountains, mountainous, mountaineer, mountaineering, mountainside, tunnels, tunneled

Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G