Illinois Traffic Stop Study

On July 18, 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 1, 2004 and was originally scheduled to end December 31, 2007. However, Public Act 98-0686 has extended the Illinois Traffic Stop Study. All Illinois law enforcement agencies must continue to collect and submit traffic stop data until July 1, 2019.

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 website.

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 website. 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.

To enter your traffic stop data, please go here