Chicago Traffic Tracker - Historical Congestion Estimates by Region - 2013-2018
This dataset contains the historical estimated congestion for the 29 traffic regions, from January 2013 to May 2018. Newer records are in https://data.cityofchicago.org/d/sxs8-h27x. The most recent estimates for each region are in https://data.cityofchicago.org/d/t2qc-9pjd.

The Chicago Traffic Tracker estimates …