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.
Sydney–Melbourne co-axial cable
The Sydney–Melbourne co-axial cable was a major telecommunications engineering and construction project in south-eastern Australia in the early 1960s, designed to significantly increase telecommunications transmission capacity between Sydney and Melbourne and other centres, along its route including Canberra.
The cable's route was approximately 960 kilometres and roughly followed the Hume Highway as it existed at that time. Key points along the route were Sydney–Liverpool–Campbelltown–Bowral–Goulburn–Canberra–Yass–Gundagai–Wagga Wagga–Culcairn–Albury–Wangaratta–Benalla–Euroa–Seymour–Melbourne.
It was five years in the making and cost £6.89 million to complete. Its prime purpose was to boost the capacity for telecommunications between the two major cities. The cable was made up of three pairs of tubes, each pair capable of carrying 1,260 simultaneous telephone connections.
There was a marker stone commemorating the official opening of the cable at 532 Hume Highway, Casula but it has since been removed. There is a corresponding marker stone in Gordon Reserve near the Parliament of Victoria in Melbourne.