The family of a late Ontario Provincial Police officer who died after a tractor trailer plowed into her cruiser joined emergency responders ahead of the long weekend on Friday to remind drivers to follow the "move over" law.

Established in 2003, the law requires drivers to slow down when approaching an emergency vehicle parked on the side of a highway. If the roadway has more than one lane, drivers are expected to change lanes so that there is a free one between their vehicle and the parked emergency vehicle.

The law was created following the death of Sgt. Margaret Eve and other officers who died responding to vehicles they had pulled over on the side of the road.

On June 7, 2000, Eve and two other officers were standing on the roadside on a call when a tractor trailer plowed into all three of them and their cruisers. Two of the officers survived, but Eve did not.

"I had to tell a three-year-old little girl and a six-year-old young man that mommy will not be coming home anymore," Eve's husband, John, told reporters during a news conference on Friday. He was joined by his now-adult daughter, Colleen Eve.

"Her accident was so preventable and that is the hardest part for my family to accept," Colleen said.

So far, OPP have laid more than 760 charges under the law this year.

Failure to obey the law can result in fines from $400 to $2,000 and three demerit points for a first offence.

With files from CTV Toronto's Zuraidah Alman and the Canadian Press