NSW police have caught fewer drink-drivers in their latest crackdown compared with a year ago, but they say many motorists are still under the illusion it's okay to drive when intoxicated.

So far just over 77,000 drivers have been breath-tested on NSW roads during Operation Drink Drive 2, a three-day blitz on drink driving that will end on Saturday evening.

Of them, 108 have been charged.

The same time last year 259 people were charged after 74,000 drivers were breath-tested.

Assistant Commissioner John Hartley said while the number of people drink-driving was down from last year, too many people still believed it was acceptable to drive after consuming alcohol.

"If you want to enjoy a few drinks with some friends, nominate a designated driver," he said in a statement on Saturday.

"But under no circumstances get behind the wheel while intoxicated.

"It can potentially result in your death or serious injury, the serious injury or deaths of your mates, or an innocent third party."

One fatality has been recorded on NSW roads during Operation Drink Drive 2.

A 73-year-old woman died after a collision between two vehicles on the Princes Highway at Gerringong, on the NSW south coast, about 8.45am (AEDT) on Friday.

At Nelsons Plains in the NSW Hunter River region a 41-year-old woman allegedly returned a positive breath test reading of 0.300 about 7pm (AEDT) on Friday.

She was issued with a court attendance notice and her licence was suspended.

At Newport on Sydney's northern beaches a 56-year-old man was clocked travelling at 116km an hour in a 60km/h zone about 1.10pm (AEDT) on Saturday.

He was issued with a traffic infringement notice for exceeding the speed limit by more than 45km/h and had his licence suspended.

Operation Drink Drive 2 concludes at 11.59pm (AEDT) on Saturday.