It involves a limited edition collector's card series featuring Waikato trucks.
Each card also has a unique road safety message aimed at heavy vehicle drivers and prizes will be on offer to those who collect all 10 in the series.
Sergeant Gilbert Williams, of Waikato's commercial vehicle investigation unit (CVIU), says cards are being handed out by officers every week to truck drivers.
"Even when a truck has been stopped for an offence, or an offence has been detected during a routine stop, presenting a Waikato Truck Legends card almost always ensures the driver leaves on a positive note.
"Truck drivers are often asking us about the cards unprompted, which gives us the opportunity to discuss the key road safety messages in the series and ensure the importance of heeding them is understood," Sergeant Williams says.
National Road Carriers executive officer Grant Turner says combining safety and image are the fundamentals to a successful road safety campaign.
"Usually, a well presented truck is one that is well looked after and that includes the running gear that needs regular checks and maintenance to make sure the truck is safe for the road."
The fifth card in the series features a Kenworth T408 logging truck from Alan Forbes Transport Ltd, Tokoroa. The message encourages drivers to check loads at the start of each trip, then 50-100km down the road and in between loads.