Ever have your car towed and impounded by the city? If you have, chances are it ended up in one of two locations. 701 N. Sacramento, or 10300 S. Doty.
Below is a chart which displays the daily counts of impounded vehicles per each impound location. The timeline represents data from 2015/04/13 through 2015/07/12, or roughly 3 months. The data is from data.cityofchicago.org