alt Hacker News> Signalbox's technology identifies the train a device is on by matching a snapshot of smartphone data to a train’s trajectory data. The technology uses advanced algorithms works even with severely degraded data. We are able to pinpoint a smartphone to any type of train without background location tracking or hardware.
Hmm, that's...interesting?
Replies
RobinL • today at 4:10 PM
It works fairly well empirically: my 7yo likes to watch trains and we regularly use this map to know when to expect one to pass. Not perfect, but pretty good
ed_elliott_asc • today at 10:16 AM
I wonder what app has allow location on all the time and is feeding them their data
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Seems similar to Transit's approach: https://blog.transitapp.com/go-underground/