Based on the search results provided, the effectiveness of speed cameras in Chicago is mixed:
The Illinois Policy Institute study found that 43% of school zone cameras and 51% of park cameras showed an increase in collisions in their vicinity. This suggests the speed cameras may not be improving safety as intended.
However, the City of Chicago's own 2022 Annual Report on the Automated Enforcement Program claims that traffic crash data shows significant decreases in angle, total, and rear-end crashes at intersections with red light cameras[4]. The report also states that average vehicle speeds near speed cameras have decreased by 16.4% since installation[4].
Additionally, a 2022 study by researchers at the University of Illinois at Chicago found that the deployment of speed cameras reduced the expected number of fatal and severe injury crashes by 15%[4][5].
So in summary, the data on the effectiveness of Chicago's speed cameras is mixed. Some studies have found safety improvements, while others have found increases in collisions near the cameras. The city's own data seems to show positive safety impacts, but independent research has raised questions about the cameras' effectiveness. More rigorous, impartial studies may be needed to definitively determine their impact on traffic safety in Chicago[2][3].
Citations:
[1] https://www.illinoispolicy.org/speed-cameras-issue-more-tickets-in-2021-than-chicago-has-residents/
[2] https://www.cbsnews.com/chicago/news/uic-study-speed-cameras-safety-tickets-relationship/
[3] https://www.reddit.com/r/chicago/comments/11ykopc/new_study_questions_effectiveness_of_speed/?rdt=35720
[4] https://www.chicago.gov/content/dam/city/depts/cdot/Red%20Light%20Cameras/2024/2022_AE_Report_FINAL.pdf
[5] https://www.chicago.gov/content/dam/city/depts/cdot/Red%20Light%20Cameras/2022/Sutton%2BTilahun_Chicago-Camera-Ticket_Exec%20Summary-Final-Jan10.pdf