What's on the Short North arches? An answer from the city

COLUMBUS -- People who live in or drive through the Short North are doing a double take as they notice something atop the neighborhood's historic arches.Social media users have speculated it could be anything from ShotSpotter technology to a traffic camera.Turns out, it's neither.The city of Columbus said it's a wireless radio that maintains communication between city traffic signals."As part of the Columbus Traffic Signal System project, the existing system is being migrated in phases to the ne