Chicago Traffic Tracker - Historical Congestion Estimates by Segment - 2011-2018
This dataset contains the historical estimated congestion for  1270 traffic segments, in selected time periods from August 2011 to May 2018. Newer records are in https://data.cityofchicago.org/d/sxs8-h27x. The most recent estimates for each segment are in https://data.cityofchicago.org/d/n4j6-wkkf.

The Chicago …