Ok, I checked at work, and this is the answer I received:
It is allowed publicly, unless posted.
My return answer was, it's posted on the bus, no weapons and received this answer back:But frankly, think about it – if you don’t have to use it, no problem. If you DO have to use it, they would likely be grateful that you did. I’m just saying.
So, take that how you may.
I'll present the legal garbage to this same person and see what comes of it and let you know.