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On July 18th, 2003 a new Senate Bill was signed into law. This law established a four year statewide study of traffic stops to collect data to identify racial bias. The study began on January 1st, 2004 and was originally scheduled to end December 31, 2007. However, Public Act 96-0658 has extended the Illinois Traffic Stop Study. All Illinois law enforcement agencies must continue to collect and submit traffic stop data until July 1, 2015.

The Illinois Department of Transportation (IDOT) is responsible for collecting and compiling the data. IDOT has developed an Internet self reporting application for submission of the data. Agencies have two options for entering data into the IDOT data collection system.

  • The agency can use the IDOT web site to enter data on individual stops.
  • The agency will have the option to compile the data using their own data application. The data can be exported from this application into a text file that can then be uploaded to IDOT's web site.

Agencies using their own applications are encouraged to upload their data to IDOT at least once a month.

All agencies will need to be registered in order to enter or upload data using this web site. They will also need to be registered in order to download the standalone applications. In order to register, please call Suzanne Hulett at (217) 785-2364.


Effective January 1st, 2012, a new set of data elements must be collected for the Illinois Traffic Stop Study. Public Act 97-0396 changed the race categories for the data collection and Public Act 97-0469 required additional information to be collected on police dog sniff searches. All stops conducted in 2012 must be submitted using the new 2012 format. However, please be sure to submit your 2011 data using the 2007-2011 format. Note: All 2011 traffic stops must be submitted to the Illinois Department of Transportation by March 1st, 2012.

If you are entering 2011 data, please go here

If you are entering data for 2012 or later, please go here

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