Crowdsourced Cell Phone Data Could Keep Bridges Safe and Strong

upstart writes:

Crowdsourced cell phone data could keep bridges safe and strong:

Your cell phone could reveal the health status of bridges just by being in your pocket as you go about your daily travels.

Accelerometers and GPS sensors that are standard components in smartphones collect information that can show how bridges flex and vibrate as vehicles travel across, researchers report November 3 in Communications Engineering.

Apps that gather the measurements could keep travelers safe by alerting engineers that a bridge needs repair. The tools could also warn of, or help prevent, catastrophic failures like the tragic footbridge collapse in the western Indian state of Gujarat on October 30, or the bridge span that crumbled in Pittsburgh in January.

"This is really applicable to any type of bridge," says civil engineer Thomas Matarazzo of the U.S. Military Academy at West Point in New York. All you need, he says, is a way to get a smartphone on there - whether by car, in the pocket of a pedestrian or mounted to a scooter - and some way of monitoring the device.

Bridge failures, Matarazzo says, often come down to uncertainties about structural properties. "The only way to reduce those uncertainties is to monitor more frequently." Crowdsourcing data from cell phones may be the best, and possibly only, way to get lots of data on bridges around the globe.

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