Are those perfectly straight highway lines really being painted by a machine, or is there something a lot more human going on?

We get into how highway lane markings actually get made, starting with thermoplastic material and tiny reflective glass beads that make lines glow under headlights at night. You'll also learn how the process works and why the straightness of the line still comes down to one specific, highly skilled job most drivers have never heard of.

The technology handles more than you'd expect, and somehow, less than you'd think.

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