Darwin 101

NoobCannon · 20 Oct 2018 at 22:41

FoxEye said:
In the case of a working traffic light, sure. But if faulty? Faults - esp short circuits - can cause all softs of different failure modes.

If the amber bit isn't working you'd have green...nothing/pause... red, or possibly even green...red depending on how the the circuit fails if shorted/faulty.

I wont argue with you but just as a bit of an fyi, Traffic signals have many different internal and external monitoring systems to ensure unsafe stuff doesnt happen, just think how
Many people rely on them every day. Theres stuff like intergreen and all red timings to ensure that cars have time to stop before a green is shown to another ped/road phase

He would have to be incredibly unlucky to get no ambers and even then he would have been shown red a set amount of time before the pedestrian was shown a green.

Rroff · 20 Oct 2018 at 22:47

NoobCannon said:
He would have to be incredibly unlucky to get no ambers and it would be the drivers fault if he hit a pedestrian regardless.

Regardless it went instantly from green to red while within the marked zig-zag section - while it might have been the drivers "fault" it is only through a mixture of luck and that my friend reacted instantly somehow that it didn't end badly.

NoobCannon · 20 Oct 2018 at 22:50

Rroff said:
Regardless it went instantly from green to red while within the marked zig-zag section - while it might have been the drivers "fault" it is only through a mixture of luck and that my friend reacted instantly somehow that it didn't end badly.

I edited that bit out to try and explain it alittle More but obv you got It before my edit

If anyone is REALLY interested ive hundreds of timing sheets on my laptop just to show that it would be impossible to get an instant ped green without having the vehicles shown red an amount of time before

Its just a sheet of numbers that mean nothing to anyone else tho really

Rroff · 20 Oct 2018 at 23:05

NoobCannon said:
If anyone is REALLY interested ive hundreds of timing sheets on my laptop just to show that it would be impossible to get an instant ped green without having the vehicles shown red an amount of time before

I don't think the pedestrian light went green instantly though I'm not sure but it wasn't long after we got the red - it was like the worst possible timing - a few feet earlier we'd have much more easily stopped in time a few feet later we'd have cleared the crossing in time.

NoobCannon · 20 Oct 2018 at 23:25

Rroff said:
I don't think the pedestrian light went green instantly though I'm not sure but it wasn't long after we got the red - it was like the worst possible timing - a few feet earlier we'd have much more easily stopped in time a few feet later we'd have cleared the crossing in time.

Thought id show you an example here.

C being a road phase and f being a pedestrian phase theres a 6 second period/gap between the cars loosing the green and this perticular ped phase getting a green. which is more than enough for
This perticular 30 mph road, obviously this changes as required

Rroff · 21 Oct 2018 at 01:05

Definitely wasn't a 6 second gap, with the other set on the fritz and not long ago they stopped working entirely one morning a bit further up the road there is probably something quite wrong. Then again they don't have a good reputation when it comes to traffic lights here for instance https://www.somersetlive.co.uk/news/somerset-news/yeovil-western-corridor-roadworks-pile-1858977

Rroff · 12 Jul 2019 at 17:10

Bit of a bump but they've finally picked up on some issues with the lights I was talking about - though not quite the nature I was talking about:

Sorry text is tiny but it is all that was published.