I tried to add the following road closure, but the road needs a level 3 editor to make changes:
https://www.waze.com/editor?env=usa&lon=-74.20158&lat=40.87591&s=70753555&zoom=6&segments=31829296
The Notch Rd. bridge over Route 46 in Little Falls will be closed in both directions beginning on September 4 and lasting approximately 4 month, so the closure should be scheduled in the Map Editor.
More information on the closure can be found from the NJDOT at http://nj.gov/transportation/community/meetings/documents/handout082917as.pdf
Thanks for reporting this, I have added the closure to the map - from the notes "The Notch Road Bridge over Route 46 is anticipated to be closed on or about September 6, 2017. The bridge will remain closed and detours shall remain in place for approximately 4 months. " If you see any additional update please post here or feel free to send me a message through the forum with updates.
I see you have done some editing of the map in NJ - we have a fun and active community of editors who can answer questions and help (especially with things that are locked above your current editing level) - feel free to join us on discord at https://discord.me/NorthEast_Region, look for the new_jersey channel.