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PostPosted: Sun Jun 07, 2009 22:29 
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So, a four way cross roads.

I'm turning right, across oncoming traffic.

My light goes green, so does the light for oncoming traffic. I proceed into the middle of the junction and wait to turn right, but I can't due to oncoming traffic.

My light goes red.

However, the light for the oncoming traffic stays green and does so for about 30 seconds, so oncoming traffic keeps coming.

Light for oncoming traffic goes red, I make my turn. About a second later the lights for the other road across the juntion go green.

The bit it italics, anybody know where else opposing lights go red out of phase of each other? There are no filter arrows.


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PostPosted: Sun Jun 07, 2009 22:47 
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weepej wrote:
So, a four way cross roads.

I'm turning right, across oncoming traffic.

My light goes green, so does the light for oncoming traffic. I proceed into the middle of the junction and wait to turn right, but I can't due to oncoming traffic.

My light goes red.

However, the light for the oncoming traffic stays green and does so for about 30 seconds, so oncoming traffic keeps coming.

Light for oncoming traffic goes red, I make my turn. About a second later the lights for the other road across the juntion go green.

The bit it italics, anybody know where else opposing lights go red out of phase of each other? There are no filter arrows.



There is a juction like that in Goddalming. It is a breathtakingly stupid and dangerous layout/phasing!

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PostPosted: Mon Jun 08, 2009 08:23 
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Yes, lots of them round here. :x

I think it is to do with allowing traffic from the opposite direction from you to turn right and avoid tailbacks. Is the junction one where the tidal flow is more in one direction than the other?

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PostPosted: Mon Jun 08, 2009 19:28 
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I've never come across this other than if there was a right filter on the opposing direction.

It seems highly illogical, but as long as you are given sufficient time to clear the crossing after the opposite direction's light has gone red then I suppose it would work-ish.

At least it's better than the modern trend of giving every arm a separate green phase.


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PostPosted: Mon Jun 08, 2009 19:30 
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malcolmw wrote:
Is the junction one where the tidal flow is more in one direction than the other?


Perversely the red is shown longer to the road that always has the queues on it.


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PostPosted: Mon Jun 08, 2009 19:32 
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Was this in London? Sounds like a "Ken Special"


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PostPosted: Mon Jun 08, 2009 19:33 
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Johnnytheboy wrote:
It seems highly illogical, but as long as you are given sufficient time to clear the crossing after the opposite direction's light has gone red then I suppose it would work-ish.



I've seen it catch a few out now. People turning right asume that because their light has gone red that the light for the oncoming traffic has gone red too, leads to a bit of a jolt and a sudden stop when they realise that the other cars are still coming.

I got a beep there the other day too, I think because the person behind assumed I should move off and turn right because my light was red, I turned round and pointed at the green light behind me and shouted "it's still green for them".


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PostPosted: Mon Jun 08, 2009 20:38 
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I've seen it catch a few out now. People turning right asume that because their light has gone red that the light for the oncoming traffic has gone red too, leads to a bit of a jolt and a sudden stop when they realise that the other cars are still coming.


They use a red arrow in parts of North America in those circumstances.

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PostPosted: Mon Jun 08, 2009 20:48 
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I often wonder if people who design these junctions actually drive?

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PostPosted: Mon Jun 08, 2009 21:03 
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graball wrote:
I often wonder if people who design these junctions actually drive?


I've a got a Tory council, and you know how most Tories like their cars.

And if it's a TFL maintained junction the the proprietor of TFL (one B Johnson) is quote famous for his taste in expensive cars.


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PostPosted: Mon Jun 08, 2009 21:57 
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weepej wrote:
So, a four way cross roads.

I'm turning right, across oncoming traffic.

My light goes green, so does the light for oncoming traffic. I proceed into the middle of the junction and wait to turn right, but I can't due to oncoming traffic.

My light goes red.

However, the light for the oncoming traffic stays green and does so for about 30 seconds, so oncoming traffic keeps coming.

Light for oncoming traffic goes red, I make my turn. About a second later the lights for the other road across the juntion go green.

The bit it italics, anybody know where else opposing lights go red out of phase of each other? There are no filter arrows.

At long last I can connect with you :) I have a junction near my work which sounds the same bud...

I have honestly felt compelled to write to 'whoever would do something' about it in fact :x

I know several crossroads which seem almost deliberately timed only to p1SS drivers off and delay people :bounce1:

I can Google Earth them here on request...

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PostPosted: Tue Jun 09, 2009 10:06 
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Big Tone wrote:
weepej wrote:
So, a four way cross roads.

I'm turning right, across oncoming traffic.

My light goes green, so does the light for oncoming traffic. I proceed into the middle of the junction and wait to turn right, but I can't due to oncoming traffic.

My light goes red.

However, the light for the oncoming traffic stays green and does so for about 30 seconds, so oncoming traffic keeps coming.

Light for oncoming traffic goes red, I make my turn. About a second later the lights for the other road across the juntion go green.

The bit it italics, anybody know where else opposing lights go red out of phase of each other? There are no filter arrows.

At long last I can connect with you :) I have a junction near my work which sounds the same bud...

I have honestly felt compelled to write to 'whoever would do something' about it in fact :x

I know several crossroads which seem almost deliberately timed only to p1SS drivers off and delay people :bounce1:

I can Google Earth them here on request...


The trouble with this layout is that it seems specifically designed to kill people!

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PostPosted: Tue Jun 09, 2009 14:26 
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weepej wrote:
Johnnytheboy wrote:
It seems highly illogical, but as long as you are given sufficient time to clear the crossing after the opposite direction's light has gone red then I suppose it would work-ish.



I've seen it catch a few out now. People turning right asume that because their light has gone red that the light for the oncoming traffic has gone red too, leads to a bit of a jolt and a sudden stop when they realise that the other cars are still coming.

I got a beep there the other day too, I think because the person behind assumed I should move off and turn right because my light was red, I turned round and pointed at the green light behind me and shouted "it's still green for them".


I'm not saying it's ideal in the least, but waiting to turn right in the middle of the junction for the oncoming traffic to clear seems to be the same situation whether your light is red or green. As long as you passed the light at green, you're not doing anything wrong.


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PostPosted: Tue Jun 09, 2009 20:31 
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I am no longer amazed at how much more dangerous our roads are being made by incompetent councillors. Luckily for all of us car manufacturers are improving car safety faster than the partnerships are destroying safety.

I often wonder what the death toll on the roads would be if we all still drove cars with the crash protection available in the 80's. I reckon we'd be close to 20,000 fatalaties per year now.


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PostPosted: Tue Jun 09, 2009 22:26 
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Traffic lights just like this in Lostock Hall - seen numerous near misses here :o

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PostPosted: Tue Jun 09, 2009 22:36 
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There are at least 2 like that in sunny Southend. If you are lucky, 2 vehicles can make the right turn :roll:


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PostPosted: Wed Jun 10, 2009 23:30 
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weepej wrote:
About a second later the lights for the other road across the juntion go green.

2 seconds, I'd wager.

I don't think it is illegal. As long as the amber lights last 3 seconds and the green at least 7.

Sounds a little confusing, but if there's traffic coming at you still, not all that confusing?

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PostPosted: Thu Jun 11, 2009 10:15 
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Sounds a little confusing, but if there's traffic coming at you still, not all that confusing?


The real danger is when a small gap appears in the oncoming traffic that coincides with the right turners light going red (so he expects that the oncoming light to be red as well) so he turns across the oncoming traffic expecting it to be stopping when infact it has a green and is coming on through.

(IYSWIM)

I have seen this happen many times at the junction in Goddalming. I am Amazed not to have witnessed a nasty accident!

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PostPosted: Thu Jun 11, 2009 10:59 
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Suppose the junction had no traffic lights. If you wanted to turn right, you would wait for a suitable gap in the opposing traffic and then turn. What is the difference caused by the presence of the lights?

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PostPosted: Thu Jun 11, 2009 21:00 
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malcolmw wrote:
Suppose the junction had no traffic lights. If you wanted to turn right, you would wait for a suitable gap in the opposing traffic and then turn. What is the difference caused by the presence of the lights?


That there is an assumption that when your light goes red that the light for the people coming at you goes red at the same time.

It's a bad assumption to make, but I've seen a fair few make it already since this phasing has changed.

I've seen a couple of waved fists, I presume the driver turning right thinks the driver coming at him has jumped his red light.


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