Bridges...

How long do they stay up for?

Might depend on the bridge. While I was flying from Courcle to Connous on a daily basis, I noticed every time, the bridge was made by a different person.

I've been using the same bridge I made for about an hour

I was more along the lines of saying they last under a day. Lasting only an hour sounds like a tiny time frame.

My bridge is still there...Do you think it's like, around 12~16 hours real time?

If you really want to know, stand by your bridge and check back every hour, when you notice it isn't there anymore is a rough estimation of how much time. After you get that, create another bridge and come back about an hour before that rough estimation and try to come with an exact time.

Well I'ma kinda roaming around a lot due to missing the mana tunnels often...judging from the time of my first post, it's nearing around 8 hours now.