The entire incident was caught on cell-phone camera by another driver.
The fight happened I-57 in Chicago’s South Side. The incident began with a woman changing lanes and swinging a baseball bat out of the window. That driver then gets out of the car and smashes the bat onto the hood of a silver Hyundai. A passenger in the Hyundai gets out and throw down with the woman with the bat.
The two women throw punches and pull each other's hair on the side of the freeway.
Seconds later one woman picks up the bat and gets ready to swing, and the video ends.
Po-po say they are investigating the incident and they have license plate number of the cars involved.
Here's the raw video of the fight: