Heysen Tunnels

Heysen Tunnels

The Heysen Tunnels are twin tube road tunnels which carry the Adelaide-Crafers Highway under Eagle On The Hill in the Mount Lofty Ranges in South Australia. The tunnels were excavated using a tunnelling machine normally used in heavy-duty mining operations which tunnelled through 500 metres of rock for each tunnel at an average rate of 3 metres per day.cite web |title=Heysen Tunnels Construction |url=http://www.ezyreg.sa.gov.au/transport_network/projects/adel_crafers/heysen.asp |date=13 August 2004 |publisher=Government of South Australia, Department for Transport, Energy and Infrastructure |accessdate=2007-07-14] Each tunnel carries 3 lanes of traffic.

The tunnels are named after artist Sir Hans Heysen.

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