Good news for mathematicians who love watching throngs of cyclists stream by: Portland, Oregon just became the first U.S. city to install a bicycle counter!

You'll find the digital "bicycling barometer" on the AM inbound side of the Hawthorne Bridge. It was made possible by the non-profit group Cycle Oregon which purchased the machine with a $20,000 grant. Lots of yummy extra details are over at Bike Portland, including an in-depth look at how the system works.

Seattle is reportedly just about to install one as well. Which city/location in the U.S. should be next? Where would you put one in New York City?

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