According to a new study by the Insurance Institute for Highway Safety (IIHS), red light cameras may actually reduce the likelihood of fatal accidents as a result of speeding by up to 19%.

After the IIHS surveyed two years of data from a Maryland county which utilizes red light cameras, researchers concluded these cameras “reduced by 59% the likelihood of a driver exceeding the speed limit by more than 10 mph, compared with similar roads in two nearby Virginia counties that don’t have speed cameras.” Areas known for having speeding cameras in the county also saw a reduction of fatal accidents over the years.

However, this conflicts with other studies in the recent past which found that red light cameras actually increase rear-end accidents as drivers slam on their brakes while approaching monitored intersections. Skeptics have also pointed out how insurance companies, and thus the IIHS, are benefiting from the use of red light cameras.

Overall, most drivers still disapprove of the use of red light cameras, reeling from the intrusion of privacy and the number of tickets given for turning right on red.