A police operation targeting defective trucks at a Kiama heavy vehicle stopping bay has resulted in 25 defect notices and 32 infringement notices in a single day.
Of the 166 trucks stopped in Kiama during Tuesday's Operation Shield, three trucks were also found to be operating with speed limiting devices that had been tampered with.
The operation took place on the Princes Highway between midnight Monday and midnight Tuesday.
Police were particularly concerned after one heavy vehicle was discovered to have a corroded tow attachment.
Other defects identified included bald tyres, insecure tow attachments, inoperable signal lights and fuel leaks.
One driver was also found to be operating with a suspended licence.
However, none of the violations were deemed severe enough to impound the vehicles, and none of the 95 drivers subjected to random breath tests recorded positive results. No drug tests were conducted in Kiama.
Meantime across NSW, police conducted 665 random drug tests, resulting in 14 positive results.
Drugs detected included methylamphetamine ("ice") and cannabis; one driver was also found to be carrying drug paraphernalia.
"During Operation Shield, we identified drug-affected drivers, fatigued drivers, faulty equipment, and trucks capable of travelling well above the allowable speed limit for heavy vehicles," NSW Police Traffic and Highway Patrol Commander, Assistant Commissioner John Hartley, said.
"Consider for a moment the potentially deadly consequences of any combination of those factors.
"This is exactly the kind of behaviour we have been targeting in recent heavy-vehicle operations, in order to avoid families losing loved ones to road trauma, especially in the lead-up to Christmas."
Police in Victoria and Queensland undertook similar operations on the same day.