On Wednesday dozens of kids joined family members of Cooper Stock to designate W. 97th Street at West End Avenue as Cooper Stock Way. Cooper’s mother, Dana Lerner, shared memories of Cooper, along with classmates — “Cooper’s Troopers” — who waved signs imploring motorists to drive safely.

Cooper, 9, was killed by a turning cab driver in January 2014 as he and his father crossed the street in the crosswalk with the signal.

“On that night — why we have this sign — a driver was impatient,” said Barron Lerner, Cooper’s uncle. “Impatient. Broke the law. Couldn’t wait. And now Cooper is dead. Other children are dead. Adults are dead. Every day.”