To demonstrate the depth of the problem a train was run back and forth on the Union Pacific tracks between 107th and 115th Street.
It's considered a hot spot for violations of railroad safety laws.
In just five days in May, there were three fatalities on that short stretch of track.
"People aren't aware of what's going on. They're not aware of their surroundings. They're trying to beat the train. People do it for different reasons," said Adrian Guerrero, Union Pacific.
This was part of a railroad and Chicago police education and enforcement campaign.
Officials say fines for violations start at $250.