The National Heavy Vehicle Regulator has issued an urgent warning to operators after trailer drop incidents across Australia doubled compared with the same period last year.
NHVR data show that eight trailer drop incidents have already been recorded in 2026, including one serious-injury crash, with the regulator warning that many more incidents may be going unreported.
The warning follows a fatal crash in New South Wales in April 2025, when a dolly and two rear trailers detached from the lead trailer.
Why are trailer drop incidents increasing?
NHVR Chief Operations Officer Paul Salvati said several factors were contributing to the increase, including mechanical wear, operator error, distraction and improper loading.
“Our data shows an increase in heavy vehicle incidents due to unplanned trailer drops and decoupling events, which we know can be minimised by drivers taking steps like conducting pre-start checks before every journey,” Salvati said.
The NHVR said trailer separation incidents can create major hazards, particularly on high-speed freight routes where detached trailers can trigger severe crashes.
What checks are operators being urged to complete?
The regulator is urging operators and drivers to strengthen inspection and coupling procedures before every trip.
Recommended checks include inspecting couplings, drawbars, and towbars for wear or defects; ensuring air lines and electrical cables are secured; conducting walk-around inspections; and completing a tug test before departure.
Drivers are also being reminded to ensure coupling systems remain free from dirt and debris that may interfere with locking mechanisms.
Industry pressure cannot outweigh safety
Salvati acknowledged the freight sector continues to face operational pressure but said safety standards could not be compromised.
“We know it is a challenging time for many people, and heavy vehicle drivers play a crucial role in keeping our country moving. Safety standards are critical,” he said.
From July 2024 to April 2026, the NHVR recorded 26 trailer drop incidents across its regulated jurisdictions.
The regulator is encouraging operators and drivers to report safety concerns through the Heavy Vehicle Confidential Reporting Line.