“There is little evidence” that automated traffic enforcement is an effective tool at either “improving traffic safety [or] limiting violent interactions between law enforcement and drivers during minor traffic stops … when enforcement is predicated simply on the assessment of financial sanctions," the group Fines and Fees Justice Center argued in its report.
Speeding cameras wouldn’t have changed that.
https://usa.streetsblog.org/2024/03/20/is-automated-enforcement-making-u-s-cities-safer-or-just-raising-revenue
Not to mention, many cameras are hidden and create false positives. They get mailed tickets and have to spend a day in court.