If you're really going to get into flood zones you're going to have to get better at using search engines.
https://snmapmod.snco.us/fmm/documen...efinitions.pdf
Most of Mountainside is X, which means there is no flood zone, only down by the rivers. Because, well, they're rivers.
To be honest, 1 and 2 you can pretty much google for yourself. #4 you'd have to follow traffic patterns on maps like Google or Waze during rush hours to get a better idea.