Police allege a 35-year-old Chain Valley Bay man was travelling west on Chain Valley Bay Road in Lake Munmorah about 10.30pm on Friday when he decided to stop in a parking bay to use a dating app on his mobile phone.

While stopped, the man took his foot off the brake and caused the car to roll backwards into a ditch.

Officers attended the scene shortly after and the driver was subjected to a random breath test, which returned a positive result.

The man was arrested and taken to Toukley Police Station where he was subjected to a breath analysis which returned a positive reading of 0.188.

He was issued a Field Court Attendance Notice for high range PCA and driving as a disqualified driver.

He is due to appear at Wyong Local Court on Monday, July 1.

Police have condemned several motorists for making poor decisions on NSW roads during Operation Stay Alert, which commenced on Friday and concludes at 11.59pm on Monday.

"We have already seen a number of motorists take unnecessary risks on the road this long weekend," Assistant Commissioner Michael Corboy of the Traffic and Highway Patrol Command said on Sunday.

"After the recent wet-weather conditions, we don't want to see an increase in road trauma following the conclusion of this operation.

"Road fatalities have a tragic effect on everyone involved, from the families who must grieve a loved one, to the police who attended the crash, and the communities who have lost one of their own."

"It's simple: Slow down and Stay Alert."

Officers will maintain a highly-visible presence on the roads during the operation, targeting speeding, mobile phone use, seatbelt and motorcycle/helmet offences, alcohol, drug-affected drivers, and fatigue.

As of Sunday morning, NSW Police had issued 2235 speeding infringements, conducted 106,860 breath tests and charged 106 people for drink driving.

There had been 140 major crashes and three fatalities.