New photos show HS2’s first tunnel safety door being installed

The first safety-critical cross-passage door has been installed inside HS2’s 10-mile-long Chiltern Tunnel, as the railway progresses from a tunnelling site into a working railway.
Cross-passage door test-installation within the Chiltern Tunnel (c) HS2
A total of 300 cross-passage doors will eventually be installed in HS2’s tunnels, linking the northbound and southbound bores and providing emergency access routes between them. The 60kg doors are designed to withstand the pressure chan