CHICAGO (CBS) — Drivers see the warnings all the time on the expressways around Chicago–don’t speed, don’t text, don’t drink and drive.

Now, authorities are trying to hammer home those safety points, with a creative, new message.

“No ketchup.”

What?

In a reference to the Chicago tradition of nixing ketchup on a Chicago style-hot dog, police are trying a new tactic to get drivers’ attention.

Message received.