#12: Train and Subway Lines
Before transit apps could construct a journey instantly, subway and train passengers needed to understand the system themselves. Regular riders memorized line names, colors, station sequences, express versus local services, transfer points, terminal destinations, and the direction required to reach a particular neighborhood. In cities such as New York, London, Chicago, Paris, or Boston, that knowledge could become almost a second language. Experienced passengers knew that two stations appearing close together on a map might require an awkward transfer, while a seemingly longer route could actually save time. Printed maps helped, but using them effectively still required understanding how the network worked. Commuters gradually stopped counting stations because they simply knew which stop followed which. Today, navigation apps can tell a visitor exactly where to board, when to transfer, and even which station exit to use.
