Hello,
Thaks for reaching out. Please take a look at the Waze for Cities partnership. If you get permission from your city to apply (there is no cost) then your police department can be authorized to add closures within the boundary of your jurisdicition.
You can also join the NJ Editors in the meantime on the Northeast Region Discord Server at this link Waze NOR Editors. The locals would be more than happy to add the closures while your application is processed.