Route
The metro consists of two lines, M1 and M2. They share a common section from Vanløse to Christianshavn, where they split along two lines: M1 follows the Ørestad Line to Vestamager, while M2 follows the Østamager Line to the airport. The lines have 22 stations and are 20.5 km (12.7 miles) long, of which 9 stations and 7.4 km (4.6 miles) km are on the common section. M1 is 13.7 km (8.5 miles) long and has 15 stations, while M2 is 14.2 km (8.8 miles) long and has 16 stations. About 10 km (6 miles) of the lines and 9 stations are in tunnel, located at 20 to 30 m (70 to 100 ft) below ground level. The remaining sections are on embankments, viaducts or at ground level.
The section from Vanløse to Frederiksberg follows the Frederiksberg Line, a former S-train line which runs on an embankment. Between Solbjerg and Frederiksberg, the line runs underground, and continues through the city center. After Christianshavn, the line splits in two. M1 reaches ground level at Islands Brygge, and continues on a viaduct through the Vestamager area. M2 continues in tunnel until after Lergravsparken, where it starts to follow the former Amager Line.
The tunnels consist of two parallel barrels; they run through stable limestone at about 30 m (100 ft) depth, but are elevated slightly at stations. There are emergency exits every 600 m (660 yd), so the train is at any time not further than 300 m (330 yd) away from one. The outer tunnel diameter is 5.5 m (18 ft), while the inner diameter is 4.9 m (16 ft). The tunnels were excavated by the cut-and-cover method, the New Austrian Tunnelling method and by tunnel boring machines (TBM). Along the elevated sections, the tracks run on alternating sections of separate reinforced concrete viaducts and joint embankments made of reinforced earth.
Read more about this topic: Copenhagen Metro
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