[dfwgator]

I am not an engineer, but my first thought was what happened with the Tacoma Narrows Bridge. My understanding was that the wind created resonance.

[mylife]

Im no bridge engineer either, but it is my understanding that wind induced resonance is generally only a problem on suspension bridges

[Don Joe]

my first thought was what happened with the Tacoma Narrows Bridge. My understanding was that the wind created resonance.

They learned that lesson real quick. That bridge's twin -- the Whitestone Bridge -- was shored up to prevent resonance, and it is a very stable bridge. I've crossed it "billions and billions" of times with nary a second thought. The only bridges that truly gave me the creeps are the ones in the mountains in Pennsylvania, where you look down and feel like you're looking down out the window of an airliner. (And, a wood plank swinging footbridge. *shudder*!)