Deaths from drivers running red lights reached a 10-year high in 2017, according to a new study.

The number of people killed when someone plowed through a light reached 939 in 2017, the last full year numbers were available, according to the study by the AAA Foundation for Traffic Safety.

That was up 31% from a low of 715 in 2009. And the fatalities in those red-light collisions increased for a fifth straight year in 2017.