Police are appealing for witnesses and dash cam footage of last week's fiery six-vehicle crash that killed two people and injured five others on the M1 motorway north of Sydney.
A 30-year-old driver has been charged after his truck crashed into the back of a car, which then burst into flames near the Mooney Mooney bridge last Tuesday afternoon.
Two men, believed to be 19 and 52, travelling together in a ute died. Five women, aged between 34 and 75 and travelling in four other vehicles, were taken to hospital.
Police have appealed for anyone who witnessed the crash or who has dash cam footage to contact them.
The truckie is due to face charges of dangerous driving occasioning death and dangerous driving occasioning grievous bodily harm at Gosford Local Court on August 21.