Nearly a week after a deadly car crash that killed two children in Park Slope, parents are preparing to come together to march for safer streets.

Parents participating in the NYC March for Safe Streets gathered at the Old Stone House, making posters to call attention to drivers who speed and run red lights.

Last Monday, police say a driver lost control of their car at the intersection of Ninth Street and Fifth Avenue, ran a red light and then hit the people crossing the street.

The collision killed 1-year-old Joshua Lee and 4-year-old Abigail Blumenstein.

The preparations are leading up to the march that begins Monday at 6 p.m. at Prospect Park and Ninth Street. Participants will then march to the intersection of the accident.