Fatal crashes are more likely after municipalities turn off red-light cameras at dangerous intersections, according to a new study.

The Insurance Institute for Highway Safety released a new study on Thursdaythat shows a 30 percent increase in the per-capita rate of fatal crashes linked to red-light running after the cameras are turned off. That's higher than the 16 percent increase in the rate for all fatal crashes at those intersections, according to the study.

Columbus wasn't included in that portion of the study, but its cameras went dark in 2015 after the state passed new rules requiring an officer to be present at intersections with automated enforcement.

Of course, we already know that crashes increased at those Columbus intersections.

We reported in April that crashes at 38 city intersections where the cameras were removed had increased by more than 8 percentcompared with the average over the previous three years when the cameras were in use.

The T-bone crashes that cameras are designed to eliminate jumped 29 percent at those intersections.

Crashes across the city had increased by about 10.5 percent.

In April, the city's safety director George Speaks said Columbus' program "undoubtedly saved lives and reduced property damage."

The insurance industry-backed study seems to confirm that.

Fatal crashes are more likely after municipalities turn off red-light cameras at dangerous intersections, according to a new study.

The Insurance Institute for Highway Safety released a new study on Thursday that shows a 30 percent increase in the per-capita rate of fatal crashes linked to red-light running after the cameras are turned off. That�s higher than the 16 percent increase in the rate for all fatal crashes at those intersections, according to the study.

Columbus wasn�t included in that portion of the study, but its cameras went dark in 2015 after the state passed new rules requiring an officer to be present at intersections with automated enforcement.

Of course, we already know that crashes increased at those Columbus intersections.

We reported in April that crashes at 38 city intersections where the cameras were removed had increased by more than 8 percent compared with the average over the previous three years when the cameras were in use.

The T-bone crashes that cameras are designed to eliminate jumped 29 percent at those intersections.

Crashes across the city had increased by about 10.5 percent.

In April, the city�s safety director George Speaks said Columbus� program �undoubtedly saved lives and reduced property damage.�

The insurance industry-backed study seems to confirm that.