The other day, quite early in the morning, Tulia and I were walking along when a car pulled up beside us, they rolled down the window and asked me for directions. I know our downtown area extremely well and could provide very detailed directions including about the one way streets. They asked why I knew about the one way streets. Knowing which are one way help me to figure out where I am if I lose count of blocks. So, I remember which are two way, which are one way and which order they are in. The people were very impressed with my directions. I could tell them exactly how many blocks to travel and which streets to turn on. As for visual landmarks, they were out of luck.