Arnolds Park, IA (KICD) — A digital radar sign in the city of Okoboji seems to be having its intended effect. Police Chief Jason Peterson says it went up on Stake Out Road where a blind corner intersects with the Dickinson County bike trail.

Peterson tells KICD News the sign actually collects and keeps data, so they know it’s working.

And even though the display only faces one way, it actually records the speeds of traffic heading both ways.