MILWAUKEE (CBS 58) -- By now, you've probably heard about "Vision Zero," Milwaukee's coordinated effort to eliminate traffic fatalities over a period of years. 

The program was launched four years ago, and on Wednesday its organizers held what they called a Vision Zero Summit at Milwaukee's Central Library. 

The summit offered outdoor presentations and national keynote speakers indoors at Centennial Hall. 

The daylong event is free and open to the public. Community engagement is a big part of the program's blueprint. 

Vision Zero's goal of zero deaths may sound idealistic, but one of the organizers tells us it's producing results. 

"Since we've adopted Vision Zero, we've actually seen our traffic deaths go down, and that's really because of our commitment to having a safe systems approach where we change how streets are designed," Policy Director Jessica Wineberg said. "We do things like administer whole blood. We double down on education, and we also have new accountability measures."

Wednesday's severe weather threats haven't been helpful for the summit, but speakers are still scheduled until 7:30 p.m.