On this episode of Our American Stories, every day, we trust our lives to a few thin lines of paint. But the open road used to be the Wild West for most motorists. Drivers relied on instinct to stay in their lanes—and many didn’t. Accidents piled up until one motorist decided to paint a line down the middle of a Michigan road. That single act gave birth to the modern centerline—the thin stripe that turned chaos into order. Over time, it evolved into the pavement markings and road striping systems that shape how traffic moves today. Here’s our regular contributor, The History Guy, with the story.

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