This is a guest post from Jonathan Smith. While traveling this past week I found myself waiting on a train platform. I was headed south from Boston and the train was delayed. While I was waiting for my train I saw a man come bursting through the station doors. He ran to the track next to mine and asked the conductor whether the train that was leaving just then was bound for Washington, D.C., his destination. When he was told that it wasn’t, he asked where his train platform was. The conductor didn’t know the answer and suggested that the man go back upstairs into the station and check the board. I knew based on his questions that I was waiting for the same train that he was looking for. Just as he was about to run up the stairs and back to the main station, I stopped him and let him know that he was in the right spot.