HS2’s reveals first completed ‘green’ tunnel

The first completed cut and cover tunnel on Britain’s new high-speed railway has been revealed at a site on London’s western periphery. HS2’s 880-metre Copthall ‘green’ tunnel near West Ruislip has been created using 1.2 million cubic metres of material excavated during construction of the line’s nearby twin-bore Northolt tunnel. Originally planned as an open […]