You can't see that they're in violation: the RF transponder effects compliance and you pay when using the lane, if you're talking about the lanes i used to use to great effect, for money.
Tall driver in a SUV looking down on an open topped convertible isn’t a false positive. But sure, cops occasionally pull people over in HOV lanes for false positives and then let them go.
However, when you’re looking at 100’s of cars doing the same thing false positives only account for a small percentage of that.
Not really sure, but this comment doesn't seem responsive to what I posted (since I was not in an open-topped convertible).
And the point about cops is exactly the issue - there is an actual human who observes and notes that it was a false positive, vs an anonymous report with no counterpoint entered into whatever database is tracking these reports.
i think i must have had a previous generation FasTrak because my rf transponder didn't have an occupancy setting on it. perhaps i had set it up on the web portal. this was over 10 years ago, from east bay to/from cupertino.
Does that setting actually matter? When I lived in the area that had these, I always forgot to set it when the number of passengers in my car changed. I never saw any difference. The charge is the same.
( https://en.wikipedia.org/wiki/FasTrak )