A truck driver has been charged following a multi-vehicle collision on the M7 at Acacia Gardens last week.
About 3.30pm on July 20, a tip truck and trailer was travelling west on the motorway when it hit the rear of a 12-seater Toyota Hiace van.
This resulted in further collisions between a Peugeot, a Mazda 3 and a Toyota Hilux ute.
A 13-year-old girl and her 14-year-old sister were both ejected from the van and were treated at the scene by doctors before being airlifted to Westmead Children’s Hospital.
The girls remain in serious but stable conditions receiving treatment for head and facial injuries.
An 82-year-old woman, who was driving the Peugeot, was trapped inside her car for an hour and a half before being freed by officers from Fire and Rescue NSW.
She was taken to Westmead Hospital where she remains in a stable condition with a fractured vertebra.
Six other people were taken by ambulance to Blacktown Hospital for treatment of minor injuries.
All westbound lanes of the M7 were closed for a number of hours while officers from the Metropolitan Crash Investigation Unit conducted examinations of the scene.
A 48-year-old Minchinbury man has been charged with two counts of dangerous driving occasioning grievous bodily harm and one count each of misconduct causing actual bodily harm and negligent driving occasioning grievous bodily harm.
He was granted bail to appear in Mt Druitt Local Court on August 9.
His drivers licence was suspended by police.