SOURCE: Aadmer Mahani, USA Today

CHICAGO — The Windy City has begun installing what sounds and looks a whole lot like a Fitbit that can measure the vitals of a bustling metropolis.

Chicago, which partnered on the project with researchers at the University of Chicago and Argonne National Laboratory and several corporations, last week installed the first two of 500 modular sensor boxes. The devices will eventually allow the city and public to instantly get block-by-block data on air quality, noise levels, as well as vehicular and pedestrian traffic.

The project — dubbed the Array of Things and described by Chicago officials as a "fitness tracker for the city" — is a first-of-its-kind effort in the nation. Plans are in the works to replicate the project in the coming years in more than a dozen other cities, including Atlanta, Chattanooga, and Seattle. The Chicago project was funded with the help of a $3.1 million National Science Foundation grant.