Authorities are investigating the trucking company who's semi-trailer was involved in Monday's fiery crash on the M1.
Police and the RMS are currently inspecting Garousse trucks in Wetherill Park in Sydney.
A truck hit the back of a parked truck at Cooranbong, and a third truck and a car also crashed.
All vehicles burst into flames.
The driver of one of the trucks died at the scene.
NSW Police say the results of today's compliance operation will be released later today.