ILLINOIS (WCIA) — A new study suggests car crashes are costing the state close to $4 billion per year.

The Illinois Economic Policy Institute (IEPI) conducted the study, after the Illinois Department of Transportation (IDOT) said there were 324,000 crashes resulting in 66,703 injuried in 2016.

The IEPI says those crashes cost the state about $3.8 billion, when you factor in things like medical costs, emergency services, workplace absences and productivity loss.

That’s why they want the state to invest in infrastructure. They say even something as small as adding rumble strips or more lighting to an interstate could mean the difference between life and death.