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Re:San Diego’s Smart Streetlights Yield a Firehose of Data by trhway on Thursday January 17, 2019 @01:42PM (#18933275)
>So the speed limit may be 25 but if the prevailing traffic indicates that everyone thinks 40 is OK then you can't get ticketed for keeping up with traffic.

oh! that probably explains why i never in the almost 20 years here got tickets in such a situation, and i thought that i'm just good at spotting police cars (and slamming on the brakes each time i see a one) - here they are much easier to spot because they don't hide cheetah style in roadside bush like the traffic policemen do back in Russia.

Re:San Diego’s Smart Streetlights Yield a Firehose of Data by gumby on Thursday January 17, 2019 @02:23PM (#18933718)
Also in Cal they can't use radar unless they've recently done one of those surveys and set the radar speed threshold based on the criteria I mentioned. And they have to post a sign warning you of radar use. Of course there's no rule saying they have to remove those signs once the survey has expired (3 years I think...) so those radar in use warnings are all over the place and you can't tell which are actually true :-(

Also in California "speed traps" are illegal: this is when a highway runs through a town or district and the district puts up a sudden "25 MPH" sign so they can catch out of towners and charge them money.