Des Moines' new viaduct art mimics Northern Lights

"Borealis" is a new functional art light display under the bridge at Eighth and Cherry streets in downtown Des Moines.

• Transitioning color mimics patterns seen in the Northern Lights.

State of play: The project is a piece of Operation Downtown's effort to create a more welcoming environment and enhance the city's walkability.

• Polk County government, the Greater Des Moines Public Art Foundation and EMC Insurance paid for the project

Worthy of your time: Washington, D.C.-based artist Alex Braden explains his goals for the project in this one-minute video.