Why the wiggle in a crowd’s walk can put a wobble in a bridge

Pedestrians tend to sync their steps, resulting in the structure’s big swings

Millennium Bridge

SWINGING BRIDGE  When it first opened, crowds on the Millennium Bridge in London (shown) caused the bridge to sway wildly. Scientists have made improved simulations to determine the conditions that lead to such wobbly bridges.

Cedric Weber/Shutterstock

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Physics

From the Nature Index

Paid Content