User:Montecara/Sandbox/Aurean Tunnels

Aurean Tunnel

Overview
Location	Montecara to Paretia
Coordinates	39°43′27″N 83°31′52″W
Crosses	Western Aurean Strait
Start	Montecara
End	near Mavoa, Luzela
Operation
Operator	Trenalia
Technical
Length	6.88 kilometers (4.28 mi)
No. of tracks	2 single track tunnels 1 service tunnel
Track gauge	1,500 mm (4 ft 11 1⁄16 in)
Electrified	25 kV / 50 Hz AC overhead lines

The Aurean Tunnel is a twin-bore rail undersea tunnel traversing the Western Aurean Strait between Montecara and Paretia. Planned and built between 1960 and 1967, it was at the time of its completion one of the most expensive engineering projects in world history.

The tunnel runs under the island of Madona, which is home to much of its ventilation, maintenance, and firefighting infrastructure.

Planning

• Tunnel versus bridge, road versus rail
• Funding model
• Engineering
• Geology
• Railway design
  • Loading gauge
  • Signaling
  • Power
  • Track system
  • Ventilation and drainage

Operation

• Services
• Passenger numbers
• Economics
• Security
• Border controls

Other services

• Electric interconnector
• Internet cabling