The train is crowded as it leaves the Loop during the evening rush hour. As it reaches various neighborhoods, commuters disgorge bit by bit, and the train car gradually becomes less and less crowded.
As you sit next to the big guy in the puffy down jacket, you keep looking around the car for two vacant seats together, planning your move so you can both spread out and have a little extra room.
Finally you see your opportunity, and you slide over to one of the two empty seats across the aisle down the way. Ahhhh! Relief.
This move to a vacant pair of seats is just one of the unspoken common behaviors we all practice on the CTA. Like always sitting in one of a pair of vacant seats before taking a single vacant seat next to someone.
It’s just what we do.
What other common behaviors do we share like these?