Police had been working to make all motorists they encountered or pulled over aware of the changes.
She said it was too early to say whether or not people were getting the message about the change.
"We really can't speculate whether it's because people are becoming aware of the changes or whether we [police] have been in the wrong place at the wrong time with our patrols," she said.
"Regardless, we are continuing to push the message that if people are planning to drink and socialise, they make plans beforehand to ensure they have a sober driver or a way to get home safe.
"With Christmas and the festive season fast approaching we really can't stress that enough," she said.
Brew Craft Beer Pub co-owner Nigel Gregory said the new limit had not had a negative impact on business, but staff had noticed an increase in sales of low-alcohol beverages.
"We've noticed many of our customers are going for beers with a low alcohol content."
Mr Gregory said Brew offered many low-alcohol brews, the lowest containing 2.7 per cent alcohol.
"If anything the law change has helped the hospitality industry recognise the need to offer these sorts of options, which is positive."