In late August 2016, the city of Chicago, in partnership with the University of Chicago and the Argonne National Laboratory, began installing sensor nodes on city streets for its Array of Things (AoT) urban sensing project. By the end of 2018, 500 nodes will be installed across Chicago to collect data on weather, traffic, and air quality. The project was funded by a US$3.1 million grant from the National Science Foundation, as well as from additional investments from the Argonne National Laboratory and the Chicago Innovation Fund. Researchers and city officials hope they will be better able to identify and address the root causes of the city’s challenges. One of the primary goals is that the collection of data on the city’s environment, infrastructure, and activity will prevent problems such as urban flooding, while also improving traffic safety and air quality. By using predictive analytics, the city can enact data-driven policies.