LabVIEW
Traffic light control / demand request / night mode
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@cbutcher wrote:
@RavensFan wrote:
Ouch. Why would they do that? That is one of the dumbest things I've ever heard. Does that provide some advantage? I've been to England a couple times, but I don't recall seeing that.
That seems to be a dangerous situation. It would be more likely for a driver to jump ahead on the green light in anticipation of it turning green and risk being in the intersection early when someone runs a red light! When driving safely, just because you light turns green, you should still take a second before hitting the gas pedal to look to see you don't have someone about to run the light that just turned red for them. Giving an advance warning of green to you means you are going be biased to starting out a second or so earlier than would be safe.
You had me thinking I was crazy, so I had to check, but here it is from Wikipedia:
In Britain, and much of Europe, normal traffic lights follow this sequence:
- Red – stop
- Red and amber – stop, but prepare to proceed
- Green – proceed with caution, but only if the way is clear
- Amber – stop unless it is unsafe to do so
I would hazard that perhaps being ready to go saves time, gets more cars through the light, etc.
In Japan, it's often a slow-moving affair when a light turns green (despite the fact that I think it's common to watch the other (90 degree sideways) light to see their Amber and then know it will soon be red, and you can go on green. However, sometimes people start to push forward, despite it still being red... so I suppose it's a mixed bag regardless of the signalling.
It's also common to see people accelerate into amber lights and run lights that really turned red before they entered the junction too... Perhaps that encourages starting slowly on green lights.
Edit: to put at least something helpful and related to LabVIEW in this post, here's a link to the NI description/tutorial for a State Machine.
What are we doing here? Imitating the Christmas tree on a drag strip???
