This video shows the Verrazzano Narrows Bridge in New York vibrating in high winds a couple of weeks ago. Listen closely.
It’s just like a guitar string or a tuning fork. Get it vibrating at the right frequency, and it sings to you.
If the bridge is properly built, it’ll withstand those stresses. If it’s not, like the infamous Tacoma Narrows Bridge known as “Galloping Gertie”, things can get very interesting . . .
I guess things have come a long way in bridge design since 1940. Even so, it’s kinda scary to see the Verrazzano Narrows Bridge sway so ominously.