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Old August 23rd, 2010, 08:37 AM   #421
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Quote:
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Traffic Signal in Mendoza, Argentina
...
Cool, I didn't know that Argentina also uses the red+yellow phase before green.
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Old August 23rd, 2010, 09:02 AM   #422
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Cool, I didn't know that Argentina also uses the red+yellow phase before green.
Yup, like the UK and Colombia they also use a red+yellow phase.
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Old August 24th, 2010, 05:38 AM   #423
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Sofia, Bulgaria

Two types of lights control in this video:

1. Both oposite streams are released at once with green lights for all directions. The ones turning left have to yield the oncoming. However, the left green arrow is delayed a few seconds more so that the intersection is cleared before the side coming streams are released.

2. Only one stream is released at a time for all directions. The other three are stopped by red lights.

No countdown timers here.
There are lights before and after the intersection, as well as on the right. Very convenient.

Typical lights with countdown timers.
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Old August 24th, 2010, 07:24 PM   #424
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Don't like that two headed arrow. I'd have just used a normal green light for that.
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Old August 24th, 2010, 07:30 PM   #425
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Don't like that two headed arrow. I'd have just used a normal green light for that.
I think it's appropriate, instead. If you see just the green light you'd be tempted to turn left, while using arrows is far more explicative.
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Old August 24th, 2010, 07:54 PM   #426
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Lights with no arrows permit driving in all directions unless a dedicated sign is placed for them.

Lights with arrows permit driving in the specified directions only. Even if you have a left green arrow, you can't make 180 deg turn, if it is not explicitely indicated with this additional sign:
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Old September 16th, 2010, 07:18 AM   #427
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A new type traffic signal is being introduced called the HAWK(High-Intensity Activated crossWalK) pedestrian signal. It remains dark until activated by a pedestrian allowing people to cross street, without cities having put in uneeded full signals.

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Old September 16th, 2010, 07:50 AM   #428
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A new type traffic signal is being introduced called the HAWK(High-Intensity Activated crossWalK) pedestrian signal. It remains dark until activated by a pedestrian allowing people to cross street, without cities having put in uneeded full signals.

I suppose the reason they don't use regular regular signals is to save energy. They have those HAWK signals on Buford Highway just outside of Atlanta, GA.
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Old September 16th, 2010, 04:15 PM   #429
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I don't see the point. They look like full signals to me, just non-standard. Instead of going green-amber-red-green, they go blank-flashing amber-amber-red-flashing red-blank instead, which I see no benefit of. They'll have cost as much to install as conventional signals and the electricity savings made by not showing anything instead of green must surely me negligible, also noting that the red hand of the pedestrian crosswalk is still in situ.
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Old September 16th, 2010, 04:16 PM   #430
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Quote:
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I think it's appropriate, instead. If you see just the green light you'd be tempted to turn left, while using arrows is far more explicative.
Not really, seen as the red left turn signal is clearly present.
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Old September 17th, 2010, 03:56 AM   #431
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Quote:
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I suppose the reason they don't use regular regular signals is to save energy. They have those HAWK signals on Buford Highway just outside of Atlanta, GA.
That reminds me of the amber/red signals outside of fire depts. in BC. As soon as the doors start opening, the signal starts to flash amber for about 5 sec. Then the red flashes for as long as required. The kicker here is, is that after the emergency vehicles have left, the flashing red is treated in the same way as a stop sign, as the light may flash for some time after.

Pedestrian controlled lights are easily picked out as the green light flashes. When a person wishes to cross, they push the button and after about 2 sec (about 1 min if it has just been red), the green light goes steady. Then the usual yellow/red sequence follows.
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Old September 19th, 2010, 03:36 PM   #432
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Quote:
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That reminds me of the amber/red signals outside of fire depts. in BC. As soon as the doors start opening, the signal starts to flash amber for about 5 sec. Then the red flashes for as long as required. The kicker here is, is that after the emergency vehicles have left, the flashing red is treated in the same way as a stop sign, as the light may flash for some time after.

Pedestrian controlled lights are easily picked out as the green light flashes. When a person wishes to cross, they push the button and after about 2 sec (about 1 min if it has just been red), the green light goes steady. Then the usual yellow/red sequence follows.
That's similar to the way signals outside fire depts in Florida work, except they stay flashing amber all the time unless the door opens. In most states, if they have emergency signals, they stay solid green until the door opens.
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Old October 10th, 2010, 06:53 AM   #433
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Traffic light in Brazil










Last edited by engenx4; October 10th, 2010 at 08:22 AM.
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Old October 10th, 2010, 07:26 AM   #434
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Very futuristic and weird.
_____________________________________________________________________________
I was scrolling through the Wisconsin MUTCD and came across this little nugget:
Quote:
All traffic signals shall either be post-mounted or mast arm mounted.
Permanent traffic signals shall NOT be installed on overhead cables (or any
other means which would permit significant movement under windy
conditions).

Temporary traffic signals may be installed on overhead cables if construction or maintenance operations would not make post or mast arm mounting possible. If installed on overhead cables, temporary traffic signals must be converted to post or mast arm mountings as soon as possible after the construction operation permits.
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Old October 10th, 2010, 08:01 AM   #435
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Quote:
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Very futuristic and weird.
_____________________________________________________________________________
I was scrolling through the Wisconsin MUTCD and came across this little nugget:
I bet Illinois has a similar rule. In fact, almost all states west of the Mississippi River use mast arms almost exclusively. Spanwire seems to be an eastern thing.
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Old October 11th, 2010, 05:35 AM   #436
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I bet Illinois has a similar rule. In fact, almost all states west of the Mississippi River use mast arms almost exclusively. Spanwire seems to be an eastern thing.
Texas, Washington, and Colorado still use spanwire on some intersections though mast arms are increasingly more popular.
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Old October 11th, 2010, 07:38 AM   #437
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Texas, Washington, and Colorado still use spanwire on some intersections though mast arms are increasingly more popular.
Those three plus Oregon and Louisiana are exceptions, but they tend to prefer mast arms and use spanwire much less frequently than most eastern states.
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Old October 24th, 2010, 07:16 AM   #438
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Quote:
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Texas, Washington, and Colorado still use spanwire on some intersections though mast arms are increasingly more popular.
The wire is popular in areas that get hit by hurricanes or other strong storms. A pole falling can kill someone, a wire breaking is less of a problem. And its cheaper to fix.
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Old November 19th, 2010, 07:54 PM   #439
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Look what I found on a website:



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Old November 19th, 2010, 09:35 PM   #440
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Neat!

Probably wouldn't work for colorblind people though.
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