The occupants of the small 4WD vehicle were a male and a female.

The accident took place about 50km west of Cloncurry on the Barkly Highway.

Local Ergon workers were first on the scene to assist the couple with first aid and water. 

Queensland Police, Fire services and Ambulance crews are now at the scene and the couple are being treated for shock.

A single lane of the Barkly Highway is open to traffic at this time.