Delivery robots swarm Chicago sidewalk in viral video

You expect traffic jams on Chicago streets. You probably do not expect one on the sidewalk caused by a bunch of food delivery robots. That is exactly what runner Becca Ostien encountered near Lincoln Park. At least a dozen Coco delivery robots had gathered along North Clark Street, leaving her to navigate what looked like a miniature robot traffic jam.

The strange scene quickly spread online. Yet behind the viral video sits a bigger question about the growing number of delivery robots rolling through American cities.