Heysen Tunnels
The Heysen Tunnels are twin tube road tunnels which carry the South Eastern Freeway 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 of rock for each tunnel at an average rate of per day. The tunnels were completed in 1998 and opened on 5 March 2000.Each tunnel carries three lanes of traffic. As at 2015, 45,700 vehicles passed through them daily. The maximum height of vehicles permitted in the tunnels is , the same as the Crafers and Mt Osmond interchanges. Laser height detectors monitor traffic to provide warnings to drivers before they attempt to enter the tunnel.

The tunnels are named after artist Sir Hans Heysen.
Q2304426
South Eastern Freeway
LOC
Q5325181
Eagle On The Hill
LOC
Q2961829
Mount Lofty Ranges
LOC
Q35715
South Australia
LOC
Q330420
Sir Hans Heysen
PER
Q14935713
Heysen Tunnels
LOC
1998-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1998
DATE
2000-03-05T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
5 March 2000
DATE
2015-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2015
DATE
carries
located in the administrative territorial entity
located in the administrative territorial entity
located in the administrative territorial entity
located in the administrative territorial entity