Officer Kevin McKeary was directing traffic when he saw the Subaru sedan head west on Haworth Avenue through the Valley Road intersection, hit the Subaru SUV and land on its roof, Lt. Justin Fox said.
McKeary rushed over and assisted the driver, Fox said.
No summonses were immediately issued nor charges filed, he said.
Police were investigating.
Click here to follow Daily Voice Bergenfield and receive free news updates.