[YouTube - Link]
WPIX News asked the NY Department of Transportation what's up with the wiggles, and got this response:
"The bridge has moved this way for the last 100 years - exactly the way it was designed to - and it can move up to 16 inches daily with normal traffic conditions. The long-span suspension bridge flexibility by design allows the bridge to manage the weight of the traffic and subway cars it carries and the temperature shifts that occur throughout the year."
The Manhattan Bridge spans the East River from Lower Manhattan to Brooklyn. It opened in December, 1909, and has been renovated during the past 20 years.
You may have seen the bridge in such films as "Ghostbusters," and "Independence Day," and "I Am Legend."
Videography by Kevin Vertrees- via wpix