Are these more common than I think? To be honest, I'm not certain I've ever seen these outside of Des Moines. Elsewhere, they either have the red globe centered above the arrows/globes, or everything's aligned in a five-stack (or they've gone to FYAs). Do these exist elsewhere? Here's one for reference.
(https://i.imgur.com/J2itgdP.jpg)
Maryland uses them quite often.
Quite common in West Virginia, also seen in Colorado.
I've seen a few in Tennesee before, and I think there's a couple here in Alabama (though I can't remember where).
Quote from: MNHighwayMan on November 03, 2017, 09:29:47 AM
Are these more common than I think? To be honest, I'm not certain I've ever seen these outside of Des Moines. Elsewhere, they either have the red globe centered above the arrows/globes, or everything's aligned in a five-stack (or they've gone to FYAs). Do these exist elsewhere? Here's one for reference.
(https://i.imgur.com/J2itgdP.jpg)
Haha, at first I thought you meant the doghouse on the sign in the right-hand background.
I highly prefer this layout. Couldn't tell you why. I've personally only seen them in Colorado (https://goo.gl/9a87Rt), where there is less every year due to the FYA.
I've heard certain parts of the Northeast (other than Maryland) use this layout as well. Specifically, three 8-inch orbs stacked on top of one another, with two 12-inch arrows to the left or right.
Here's a set of older Eagle Durasigs, 1992-ish, notice how the red on the doghouse, sticks out farther:
https://www.google.com/maps/@40.1093328,-75.1450861,3a,75y,210.52h,97.34t/data=!3m6!1e1!3m4!1s0hub7ktwp06zvbYAMVe3ow!2e0!7i13312!8i6656?hl=en&authuser=0
Not sure if these are Gen 3, since these were installed in the early-1990s.
Quote from: traffic light guy on November 04, 2017, 10:06:08 AM
Not sure if these are Gen 3, since these were installed in the early-1990s.
Doesn't look like it, as I didn't see any visor tabs on the signals.
Sweden uses this, but for right turns (https://www.google.se/maps/@58.4259509,15.677739,3a,17.8y,208.46h,88.34t/data=!3m6!1e1!3m4!1sm_4oNKzK-N_hICsDQeRp6A!2e0!7i13312!8i6656).
Quote from: riiga on November 05, 2017, 09:27:01 AM
Sweden uses this, but for right turns (https://www.google.se/maps/@58.4259509,15.677739,3a,17.8y,208.46h,88.34t/data=!3m6!1e1!3m4!1sm_4oNKzK-N_hICsDQeRp6A!2e0!7i13312!8i6656).
They use this setup for the rare left turn filter signals too, right? I know they're uncommon but I seem to recall something you posted awhile back that showed a left turn arrow attached on the left.
Quote from: jakeroot on November 05, 2017, 04:43:03 PM
Quote from: riiga on November 05, 2017, 09:27:01 AM
Sweden uses this, but for right turns (https://www.google.se/maps/@58.4259509,15.677739,3a,17.8y,208.46h,88.34t/data=!3m6!1e1!3m4!1sm_4oNKzK-N_hICsDQeRp6A!2e0!7i13312!8i6656).
They use this setup for the rare left turn filter signals too, right? I know they're uncommon but I seem to recall something you posted awhile back that showed a left turn arrow attached on the left.
Indeed (looks like this (https://www.google.se/maps/@58.4097137,15.6098706,3a,18.2y,20.12h,88.03t/data=!3m6!1e1!3m4!1s43thl2O5tnldPnMDQUkz1Q!2e0!7i13312!8i6656)), though I've only seen it with a single arrow that lights up when the protected phase begins. Looking up the official regulations it seems it is allowed to use the double arrow version for left turns, but only if "there is a valid reason and it does not risk traffic safety".
Quote from: riiga on November 05, 2017, 06:30:21 PM
Quote from: jakeroot on November 05, 2017, 04:43:03 PM
Quote from: riiga on November 05, 2017, 09:27:01 AM
Sweden uses this, but for right turns (https://www.google.se/maps/@58.4259509,15.677739,3a,17.8y,208.46h,88.34t/data=!3m6!1e1!3m4!1sm_4oNKzK-N_hICsDQeRp6A!2e0!7i13312!8i6656).
They use this setup for the rare left turn filter signals too, right? I know they're uncommon but I seem to recall something you posted awhile back that showed a left turn arrow attached on the left.
Indeed (looks like this (https://www.google.se/maps/@58.4097137,15.6098706,3a,18.2y,20.12h,88.03t/data=!3m6!1e1!3m4!1s43thl2O5tnldPnMDQUkz1Q!2e0!7i13312!8i6656)), though I've only seen it with a single arrow that lights up when the protected phase begins. Looking up the official regulations it seems it is allowed to use the double arrow version for left turns, but only if "there is a valid reason and it does not risk traffic safety".
Interesting. So, basically, it's a lagging left, with no oncoming left turns permitted. I assume the double arrow version would operate similar to ours, lighting up at the beginning of the cycle, instead of the end?
Long Island and NYC also use them extensively. It's rare to find a normal doghouse in those locations.
For the most part, however, FYAs are used in new installations instead of those doghouses on Long Island.
I think Missouri uses them sometimes on mast arm installs.
I've seen these signals in Nebraska, mostly near Omaha.
Quote from: jakeroot on November 05, 2017, 07:24:10 PM
Interesting. So, basically, it's a lagging left, with no oncoming left turns permitted. I assume the double arrow version would operate similar to ours, lighting up at the beginning of the cycle, instead of the end?
Indeed, I've only seen the single arrow light up towards the end of the cycle. And I think you are correct about the double arrow version too.