Police are calling for anyone who may have witnessed a serious crash in the Gold Coast hinterland to come forward.
A truck towing an excavator flipped onto its roof after colliding with two vehicles along Tamborine-Oxenford Rd in Wongawallan around 5:30 on Thursday evening.
The driver of the truck, a man in his twenties, had to be cut free from the cab, before he was taken to hospital with critical injuries.
The drivers of the other cars were okay.
Investigators would like anyone with dashcam footage of the incident to get in touch with them.