A truck driver has been charged and his truck company is being investigated over the deaths of three people in a crash in Sydney's southwest last month.
Calvyn Logan, 59, and his elderly parents Donald and Patricia Logan, aged in their 80s, died on January 24 when a B-double truck careered onto the wrong side of the Hume Highway, near Menangle in southwest Sydney.
Police on Tuesday charged a 33-year-old truck driver from Picnic Point with three counts of dangerous driving occasioning death.
His licence has been suspended and police said they may lay further charges following the outcome of toxicology tests.
Police said they have launched a comprehensive investigation into the trucking company.
Investigators were on Wednesday inspecting the transport company's fleet of trucks at their head office in Enfield and at Roads and Maritime Service checking stations across NSW.
Two trucks have been stopped at Marulan and one on the Hume Highway at Albury, while police are tracking down the other 24 trucks still on the state's roads.
Police in Queensland, South Australia and Victoria have been alerted to intercept all trucks within the fleet to check for safety breaches, while the drivers will be subjected to roadside drug and alcohol testing.
Officers will also check the trucks for illegal substances.
Commander of the Traffic Highway Patrol Command, Assistant Commissioner John Hartley, said Wednesday's unprecedented operation was a significant warning to the trucking industry.
'Transport companies must follow safe work practices. They have a responsibility to the motorists of New South Wales,' Asst Comm Hartley said.
