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HS2 Tunnels

Overview of the tunnels being built for HS2

65
Miles of Tunnels
7
Twin Bore Tunnels
6
Green Tunnels

Digging

8%

Segment Installation

23%

Side Tunnels

15%

Surface Buildings

31%

Completed

23%
Twin Bore Tunnel

Twin-bore Tunnels

Twin-bore tunnels, each containing a single rail track, are constructed using tunnel boring machines (TBMs).

Cut-and-cover Tunnel

Green Tunnels

Green tunnels will be built using the cut-and-cover method of construction, with trees and shrubs then planted on top.