railway tunnels
Train routes underground
Railway tunnels are underground passages constructed to carry train tracks through mountains, beneath rivers, or under cities.
They allow railways to maintain relatively level grades and direct routes where surface tracks would be impractical: The railway tunnel through the Alps shortened the journey by hours.
Major examples like the Channel Tunnel connect nations across bodies of water.
- shotcretePneumatically projected concrete mixture
- ventilation systemsEquipment moving air through buildings
- excavationAct of unearthing
- mountain rangesExtended series of peaks
- mountain passRoute through highlands
emergency exits · safety inspection · signal box · drainage systems · structural integrity · track · rock strata · Eurotunnel · geological surveys · metro systems · rumble · darkness · reinforced concrete · steel · echo · shadow · damp · underwater tunnels
- railroadstrains, train, tracks, track, locomotive
- railwaystrains, train, locomotives, locomotive, tracks
- Alpine historyTyrol, Innsbruck, Austrian Alps, Swiss Alps, Bavarian Alps
railway tunnelsrailway bridges
Structures supporting train tracks over gaps
viaducts · elevated railways · overpasses · trestles · flyovers