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.

[3] The tunnels were completed in 1998 and opened in March 2000.

[1] The maximum height of vehicles permitted in the tunnels is 5.3 metres (17 ft), 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.

[2] The tunnels are named after artist Sir Hans Heysen.