I'm sure you're aware of:
http://www.njbikemap.com/
Not the most user-friendly format, but I've found it to be quite informative and accurate. I live just North your route, but I'm not familiar with roads south of I-78.
By the way, your link doesn't seem to work. And searching your username on bikely.com, I can't find the route you're referencing.
EDIT: Oh, someone else mentioned njbikemap.com in your other thread! Still, it gives a pretty good idea about elevations and safety.