An inexperienced truck driver, whose sewage rig smashed into three cars at the base of Adelaide's South Eastern Freeway, has been ordered to stand trial over the fatal crash.
Darren Michael Hicks came before Adelaide Magistrates Court on Wednesday charged with causing death and causing harm by dangerous driving over the 2014 incident.
Jacqueline Byrne, 41, and Thomas Speiss, 56, died when Hicks' truck ploughed into their stationary cars.
Defence lawyer Mark Twiggs argued the 32-year-old had no case to answer on any charges telling the court the "terrible incident" would not have occurred had the brakes on the truck been working property.
But a prosecutor said Hicks was to blame for the incident because road rules meant he should not have used the foot brakes at all on the descent into Adelaide.
Instead, he should have selected a gear to limit the truck's speed and then used the engine to slow its progress.
The court heard that Hicks had only been trained on how to properly bring a truck down such a descent eight weeks before the crash and had no experience in navigating the freeway in any truck.
The prosecutor said Hicks engaged in a prolonged period of foot braking, something confirmed by CCTV footage, which overheated the truck's brakes.
This was despite being warned in training that "if you cook the brakes , it will kill you", the court was told.
The circumstances of the crash prompted an immediate inquest which heard the truck was travelling at an estimated 151km/h just before the crash.
The coroner's recommendations prompted the state government to cut speed limits on the freeway for the descent into Adelaide, with trucks restricted to 60km/h and cars 90km/h.
Hicks has pleaded not guilty to the charges and has been remanded on continuing bail to appear in the District Court in October.