Re:Traffic lights worldwide set to change after a Swedish en...
by romwell on Tuesday October 22, 2019 @03:07PM
(#21327400)
>How am I supposed to know how quickly your yellow light changes on this street?
As a driver, you are not supposed to know this, nor should you base your driving based on this information.
It's simple: if you have enough distance to stop, you stop[1].
The yellow light is supposed to be timed so that people who don't have the distance to stop when going the speed limit would have enough time to legally pass the intersection[2].
The engineer's case (and many others) is that the lights are adjusted specifically so that this does not happen, i.e. people on a certain stretch of a road have are forced to cross on red if they don't decelerate unsafely.
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[1] Your stopping distance only depends on your speed, road conditions, and reaction time.
As a driver, you are not supposed to know this, nor should you base your driving based on this information.
It's simple: if you have enough distance to stop, you stop[1].
The yellow light is supposed to be timed so that people who don't have the distance to stop when going the speed limit would have enough time to legally pass the intersection[2].
The engineer's case (and many others) is that the lights are adjusted specifically so that this does not happen, i.e. people on a certain stretch of a road have are forced to cross on red if they don't decelerate unsafely.
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[1] Your stopping distance only depends on your speed, road conditions, and reaction time.
[2]http://redlightrobber.com/red/links_pdf/Derivation-of-the-Ye...