"It's only going to be a matter of time before someone is hurt or worse, killed.
"I hope no one ever has to see such a tragedy so that's why I sent this letter to you."
Jack's letter gained the attention of Kāpiti mayor K Gurunathan who contacted the council's roading team who checked out the intersection and decided a pedestrian refuge could be a viable solution.
The project was approved, the refuge, nicknamed Jack's Island, has been installed and a ceremony was conducted on Wednesday to officially open it.
Jack Stephens on a pedestrian refuge he instigated.
Jack, 10, and Gurunathan cut a ribbon, held by Jack's mother Nicola Stephens and traffic engineer Gary Adams, and was watched by room one classmates.