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by jdavis703 3595 days ago
They do collect. I frequently see "people counters" stationed on Caltrain trains. And BART (less frequently) sends out people asking questions like where'd you leave from, where are you going, etc. Of course those are just samples, but one hopes they're done correct enough to get a fair idea for what's going (e.g. if your poll shows more people leaving a station, than actual fare deductions at said station, then you've got a problem with fare evasion or in your poll's design).