Podcast:99% Invisible Published On: Tue Oct 02 2012 Description: Benjamen Walker had a theory that priority queues are changing the American experience of waiting in line. So he visited amusement parks, highways, and community colleges to find out how these priority queues work and who is using them. What … Continue reading → Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.