From the YouTube channel The History Guy: History Deserves to Be Remembered, comes a history lesson about road paint lines.  Using a line painted down the center of a road to denote lanes seems to be merely common sense. But it was an innovation that took a surprising amount of time to develop. The history of lane markings is a study in the rapid effect of new technologies, and the ability of a few people with a good idea to have a large impact. The History Guy remembers the surprising history of lane markings.

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