Truck drivers across Australia are set to protest outside Aldi stores, claiming the supermarket giant's low-cost contracts are compromising road safety.
The Transport Workers Union says Aldi intimidates workers into unsafe work practices such as skipping meal breaks and neglecting vehicle maintenance just to make ends meet.
Some drivers even feel pressure to break speed limits and other road rules, the union says.
"Our drivers have had enough and are struggling to cope with the pressures brought on them by Aldi," TWU Victorian secretary John Berger said.
"They are worried sick about the worsening road safety this mess has created and the fear that fatalities will occur."
The protests in Melbourne, Sydney and Adelaide on Friday are the first since the Federal Court rejected a bid by Aldi to stop the union revealing company information about rates and conditions.
The union has labelled Aldi's court case a "failed" and "flawed" response to supply chain safety issues and has vowed to continue protesting.
"We will continue to protest outside Aldi stories until the company starts taking the safety of workers in its supply chain and the travelling public seriously," Mr Berger said.
Aldi has been approached for comment.