[DaiPlusPlus]

> “When people first saw it, they said, ‘Why haven’t we been doing this for a hundred years?’” Doerr said. “That’s the kind of question I love to hear, because it means the culture of safety innovation is alive and well.”

Union Pacific haven’t been doing this precisely because they don’t have a culture of innovation…

[mark-r]

The question applies more broadly than Union Pacific. Why hasn't this been an industry standard for 100 years?

[DaiPlusPlus]

> Why hasn't this been an industry standard for 100 years?

Because the US heavy rail system is a duopoly with no incentive to innovate.