Brought this British APC towards the bridge and i destroyed a car that was in front of us. I attempted to push past the car wreck to get accross the bridge but after a half second of grinding the vehicle catapulted us up onto the top of the bridge's upper girders.
It might be somthing to do with the railway tracks and the contact points of the vehicles, but i'm no expert, just thought i'd throw it out there.
Heres a pic, i hope it works, its the first imageshack pic i have shown on the forum.
Edit: And btw, you can drive around up there

Unfortunately after some comments and laughter an enemy APC, and an RPG obliterated us. ^_^