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A comment on Light Traffic. Parent comment

Re:Light Traffic by jakecopp on Sunday January 14, 2018 @04:26PM (#16146576)
I believe the induction loops only sense if the first car is present. This is helpful, but can't detect the number of cars which I think is the next most important metric.
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Re:Light Traffic by niftich on Sunday January 14, 2018 @04:50PM (#16146692)
There's also an amusing "failure mode" of induction loops: impatient people pulling up further into an intersection -- for example, aiming for an opportunistic left turn -- and they move off of the loop. The lights cycle; the left turn green arrow which would give them an exclusive phase never materializes.
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Re:Light Traffic by nordsieck on Sunday January 14, 2018 @07:48PM (#16147581)
At busy intersections, there will typically be a loop at the 1st spot and a second loop further back - say, at the 5th spot. It's not perfect, but it's pretty good.
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