An inquest will be held to determine how Lardeen Glennon and her 14-year-old son Matthew died.
The Glennons died in September 2011 after a collision near Greenmount on the Peak Downs Hwy.
Their Hyundai Getz collided with a Holden Commodore ute Adam James Wisley was driving.
Mr Wisley was charged with dangerous operation of a motor vehicle causing death but a Mackay District Court jury in March 2015 failed to reach a verdict.
Six months later, a new trial was scrapped when a judge accepted there was no case and told a prosecutor to withdraw the charge.
The inquest is expected to examine whether road rules around overtaking should be changed.
It is also expected to examine whether there is a need to review the laws relating to evidence provided by the computers that control the airbags.
Highway features, signage and speed were also expected to be looked at.
Matthew, known as Matty, was a Year 9 student at Mercy College.
It was previously reported the Glennons were turning into a rural driveway between Old Rocky Waterholes and Wollingford Rd when the ute slammed into them.
The crash happened during a school holiday break.
Family and friends of the Glennons attended a funeral at Newhaven Chapel.
Matthew was described as a bright, popular student at a memorial held for him at Mercy College.
The Coroners Court set aside three days in late November for an inquest, ABC reported.
A pre-inquest conference with Coroner David O'Connell set down for this week outlined the likely parameters of the inquest.