Pedestrian Traffic Flow

It's funny, but I'm amazed nearly daily at the self-organizing aspects of how thousands of people are able to walk through Suburban Station and not bump into each other. It's quite a dance - speed up, slow down, twist left at the last second. I'm not sure how it all works, but it is an amazing beehive activity. (In fact, people actually study pedestrian traffic flow.) I didn't bump into anyone on my way to work. But I spent a little time wondering why.

Photo credit.