It comes at the regional launch of Road Safety Week.

Taking part is Debbie Cameron whose son David was killed riding his bike, and Harry and Maria Cape whose daughter Helen was killed while out jogging.

The launch sees 13 children, the number killed or injured on North roads each month, display the slow down message at Hilton Primary School, in Newcastle.

They will line up at their school gates carrying placards saying "20's Plenty".

It is part of the campaign to urge people driving in communities to slow down to 20mph.

David's death caused indescribable suffering to my family and the pain never goes away Debbie Cameron

Statistics show that at this speed, most children hit will survive - at 40mph, most will die.

David Cameron, seven, was killed on his bike near his home last year when he was hit by a car.

The driver, Mark Tye, 22, was sentenced to five years in prison for causing death by dangerous driving.

Debbie Cameron said: "David's death caused indescribable suffering to my family and the pain never goes away.

"But most drivers think it's okay to speed a little bit and never think they will kill a child.

"If every driver across the North East makes this commitment today, we will be working as a community to stop needless tragedies like the death of my son."