Two men and a teenage boy have died in separate road crashes in Queensland.

A man died on Monday when the car he was driving collided with a truck at the Henry Palmer Bridge in Maryborough at about 6.30am on Monday.

The truck driver suffered shoulder injuries and was taken to hospital and is in a stable condition.

On Sunday, a 66-year-old man died in hospital after his station wagon and a truck collided at Ayr in north Queensland on August 13.

A 14-year-old Toowoomba boy also died in hospital on Sunday after the car he was travelling in rolled on the Carnarvon Highway south of Surat on August 19.

AAP