Source: Gwendolyn Purdom, Chicagoist

Two years after it was announced, Chicago's ambitious "Array of Things" network of tracking sensors is finally going up around the city. Last week, the first two of a planned 500 data-collecting "nodes" were affixed to traffic light poles at Damen and Archer avenues in Bridgeport and at Damen Avenue and Cermak Road in Pilsen, according to a post on the University of Chicago's project site. Each sensor is designed to monitor air quality, ambient sound, vehicle and food traffic, climate conditions and more. The effort—a collaboration between the university, Argonne National Laboratory, the School of the Art Institute and the City of Chicago—is expected to stretch through 2018.