I noticed the "Dead End" sign you see below as we were driving around Pittsburgh. That was common when I was a kid (i.e., a very long time ago), but I can't recall seeing any around our house, only "No Outlet" signs. So I asked Google's Gemini, "Why are dead-end signs now no outlet signs?" Its response was "While it might seem like 'Dead End' signs are disappearing, it is actually less of a total replacement and more about a technical distinction in road engineering—though some cities are moving away from the word 'dead' for aesthetic reasons." It further went on to explain that the technical difference is that a 'Dead End' is used for a single road that terminates, while 'No Outlet' is used at the entrance of a network of streets that has only one way in and out. Some municipalities have phased out "Dead End" signs because the word "dead" can feel a bit morbid or lower the "prestige" of a neighborhood. You’ll often see newer developments opt for "No Outlet" or "No Through Street" simply because it sounds more modern and less "bleak."
And now we know.
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