Biggest railway tunnel-some facts!

Gotthard Base Tunnel


Coordinates: 46°36′00″N 8°45′54″E / 46.600°N 8.765°E / 46.600; 8.765

Overview
Line AlpTransit
Location Swiss Alps
Status Under construction
Start Erstfeld (Uri)
End Bodio (Ticino)
Operation
Work begun 1996
Opened 2017 (planned)
Owner Swiss Federal Railways
Operator Swiss Federal Railways
Traffic Train
Technical
Line length 57.104 km (35.483 mi) (east tunnel)
57.017 km (35.429 mi) (west tunnel)
No. of tracks 2 single track tunnels
Gauge 1,435 mm (4 ft 8 1⁄2 in) (standard gauge)
Operating speed up to 250 km/h
Highest elevation 549 m
Lowest elevation