The 16-year-old girl was pronounced dead at the scene following the collision on West Circular Road in Bangor on July 8.
Relatives of the former Army cadet are encouraging everyone in the local community to attend the poignant event which will also remember all road traffic victims and their families.
Those wishing to take part have been asked to meet at the Owenroe Drive, Clandeboye Road, in Bangor by 7.30pm on August 25.
“We are inviting every family across Northern Ireland who has lost a loved one to a road traffic accident to please join us in honouring your loved one,” a spokesperson for Jaidyn’s family said,
“Bring a photograph of your loved one, hold it high to show they are not a statistic, they matter!
“Our lives changed forever on the 8th of July, our beautiful Jaidyn was killed in a road traffic accident.
“Help us honour our loved ones, let us unite and be their voice.”
The walk will proceed to the junction at West Circular Road where a candle will be lit and a three minute silence observed to remember road traffic victims before the procession returns back to Owenroe Drive.
Jaidyn Rice
The funeral of Jaidyn Rice takes places in Bangor
North Down MP Alex Easton is among those due to speak at the event.
A 30-year-old man has previously appeared in court charged in connection with Jaidyn’s death before being released on bail.
Jamie McCartney, whose address is the subject of a reporting restriction, is accused of causing death by dangerous driving, causing death whilst driving without a license and causing death whilst driving without insurance.
Jaidyn’s mum, Elaine Clarke, previously told the Belfast Telegraph of her grief following the devastating loss.
“She was a princess. As a child she loved her wee princess dresses and tiaras, make-up and nails, she was just always really girly,” she said, recalling her love of Frozen, Barbie and One Direction.“She was for starting her A-levels in September and she wanted to go into the 212 and be an officer, and her back-up was community work/youth work or childcare,” she added.
“She wanted to serve her time and then go into community work afterwards — Jaidyn just cared about other people.”