UPDATE: A man trapped in the cabin of his 20 tonne vehicle as it teetered precariously on a cliff edge at a quarry in Brisbane's north west has been freed.
The man was trapped for more than an hour and a half after rolling the vehicle at the Keperra site about 7.20am.
Paramedics have assessed him and determined he is uninjured.
The heavy vehicle rolled onto the cliff's edge at the Settlement Road site about 7.20am.
Five fire and emergency units are on scene, along with paramedics, and the vehicle has been stabilised, a Queensland Fire and Emergency Services spokeswoman said.
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