City of Chicago | DevelopersThe best Traffic Sources and Tools for Affiliate Marketing 2020

July 21, 2020 / by Open Data Portal Team / In Open Data , Data Portal

Traffic Crash Datasets Data Source

We have made a small internal adjustment to the data source for our Traffic Crash datasets:

  • Traffic Crashes – Crashes
  • Traffic Crashes – Vehicles
  • Traffic Crashes – People

The data are fundamentally the same but come from a slightly different version of the source dataset. This change added about 0.6% to the historical count of crashes and should be more reliable on an ongoing basis.

Please feel free to contact us at or @ChicagoCDO with any questions.


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