Metro Tunnel
The Metro Tunnel (sometimes also known as the Melbourne Metro Rail Project or the Metro Rail Capacity Project) is a metropolitan rail infrastructure project currently under construction in Melbourne, Australia. It includes the construction of twin 9-kilometre rail tunnels between South Kensington station (north west of the Melbourne City Centre) and South Yarra (in the south east) with five new underground stations. The southern portal for the tunnel is to be located to the south of South Yarra station. As a result, the tunnel will connect the Pakenham and Cranbourne lines with the Sunbury line, and allow these lines to bypass Flinders Street station and the City Loop while still stopping in the Melbourne central business district.
Fremantle railway line
The new tunnel is the first in Western Australia to use a rigid overhead conductor rail instead of overhead wires, the same system as used on the Madrid Metro. With overhead wires, the clearance between the new tunnel and the existing Joondalup line tunnel is only . By using a conductor rail, the new tunnel could be built to a smaller diameter, allowing for an increased clearance between the two. The new tunnel opened on .