how to go under bridges

[Blargian]

i have placed a bridge high over a road, and people can cross the bridge but they cannot go under it. for some reason it generates impass below it (even though there is more then enough clearance). i have tried other bridges as well, and they do the same error. is there any way to fix this? or is it simply impossible to have bridges over land?
here is a screenshot of what i mean: (you will have to fix the http for the link to work, forum wont let me post a link in my first week)
h ttp://desmond.imageshack.us/Himg193/scaled.php?server=193&filename=relic00006o.jpg&res=landing
thanks

[nobody]

A bridge is a solid object, you can only pass over it.
however, by making the bridge a visual object (remove the collision mesh) you can make it passable underneth, but then nothing can pass over it.

[burtondrummerNY]

To clarify on nobody's point (which is 100% correct), place the bridge in the OOB territory, use the stamp tool, and then use the stamped bridge instead of the one in the ebps list. You won't be able to go over it, only under it. It's one or the other, which is an unfortunate part of CoH's engine.