A driver has been killed when his car overturned on a major highway.

The man crashed on the Bruce Hwy at Colosseum, a rural Queensland area about an hour-and-a-half northwest of Bundaberg.

His car overturned, and reports of the single-vehicle crash reached Queensland Police at 6.50am.

The driver had been critically injured and died at the scene.

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Investigations into the crash are ongoing and anyone with information or dashcam footage is urged to contact Crime Stoppers.