Government Technology

Police Use Low-Frequency Sound to Clear the Road


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October 6, 2008 By

San Francisco police officer Rich Lee vividly remembers the first time he tested the Rumbler in real traffic conditions.

It was a day when the manufacturer, Federal Signal, was in town to show off the Rumbler (or if you prefer, the Intersection Clearing System) to officials in various city departments and there was a photo session scheduled near the Golden Gate Bridge. It also happened to be budget week for the city and a day when the San Francisco police chief was at City Hall procuring dollars.

On his way to the Golden Gate Bridge for the photo session, Lee's BlackBerry alerted him. It was the chief at City Hall requesting Lee's attendance.

"I said, 'Can it wait 20 minutes?'"

The answer was no.


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