Traffic signal

[roadfro]

Even in WA, while there is a fair few double permissive left turns, there are many double permissive right turns, where drivers yield to peds. This would be slightly different, but not significantly so. Are there no signalized double rights turns with pedestrian yields in NV? Something like this: http://bit.ly/2A3TvFa

There's also roundabouts, where the entire concept is "yield to traffic from left". They're not signalized, but the entire concept (beyond the two existing double right yields that you've mentioned) isn't exactly foreign. For left turns? Definitely more unusual, but not so much for right turns.

Nope, I can't think of any double right turn like that. Most, if not all, double right turns are designed with a pork chop island and  signalization of the ped crossing.

[jakeroot]

Even in WA, while there is a fair few double permissive left turns, there are many double permissive right turns, where drivers yield to peds. This would be slightly different, but not significantly so. Are there no signalized double rights turns with pedestrian yields in NV? Something like this: http://bit.ly/2A3TvFa

There's also roundabouts, where the entire concept is "yield to traffic from left". They're not signalized, but the entire concept (beyond the two existing double right yields that you've mentioned) isn't exactly foreign. For left turns? Definitely more unusual, but not so much for right turns.

Nope, I can't think of any double right turn like that. Most, if not all, double right turns are designed with a pork chop island and  signalization of the ped crossing.

Well, I'll be damned. I thought each state had at least one. I'm pretty sure CA has a few too, though they have decidedly fewer pork chop islands than Nevada.

[jakeroot]

In Springfield, Oregon, I found a doghouse with a red arrow display. I think it has flashing yellow arrows, judging by this street view image, but I'm not 100% sure.

I know during the pictured phase below, the opposing direction has green for all directions (green arrow + green orb for through), so it must be displaying a flashing yellow. The "yield on green" signs were also removed, further solidifying the likeliness of it being a flashing yellow. Odd thing is, there's still orb displays. Perhaps there was some swapping?

EDIT: not the only one in Springfield. Note through phase ending...if you keep clicking northbound, a lagging green arrow pops up for southbound Mohawk traffic.

[traffic light guy]

In Springfield, Oregon, I found a doghouse with a red arrow display. I think it has flashing yellow arrows, judging by this street view image, but I'm not 100% sure.

I know during the pictured phase below, the opposing direction has green for all directions (green arrow + green orb for through), so it must be displaying a flashing yellow. The "yield on green" signs were also removed, further solidifying the likeliness of it being a flashing yellow. Odd thing is, there's still orb displays. Perhaps there was some swapping?

EDIT: not the only one in Springfield. Note through phase ending...if you keep clicking northbound, a lagging green arrow pops up for southbound Mohawk traffic.

I think the signal is a yellow trap, but it's reconfigured in the form of a doghouse

[Amtrakprod]

I got a slightly better look at this thing today, on the Mountain View Corridor (UT 85) and South Jordan Parkway:



As is obvious, the top of the doghouse is a red bicycle. The upper left of the lower part is a bicycle as well, while the lower left indication was a straight arrow. Both indications on the right were right arrows.

I would love to see how it functions, but I've never been down there long enough to observe anything other than the red bicycle on top.

Wow! If you can get a video I'd love to see it!!


iPhone

[jakeroot]

I think the signal is a yellow trap, but it's reconfigured in the form of a doghouse

You mean "flashing yellow arrow", not "yellow trap" correct? Yellow trap is a phasing style, not a signal.

[roadfro]

I think the signal is a yellow trap, but it's reconfigured in the form of a doghouse

You mean "flashing yellow arrow", not "yellow trap" correct? Yellow trap is a phasing style, not a signal.

Technically, yellow trap is not a phasing still, but rather is a result of particular phase combinations.

[jakeroot]

I think the signal is a yellow trap, but it's reconfigured in the form of a doghouse

You mean "flashing yellow arrow", not "yellow trap" correct? Yellow trap is a phasing style, not a signal.

Technically, yellow trap is not a phasing still, but rather is a result of particular phase combinations.

Conceptually, "yellow trap phasing" could be when an agency specifically implements a yellow trap as part of regular phasing. That's not something you really see anymore, but it could have been at one point. Nowadays it's a mistake, but at one point it may have been intentional.

[roadfro]

I think the signal is a yellow trap, but it's reconfigured in the form of a doghouse

You mean "flashing yellow arrow", not "yellow trap" correct? Yellow trap is a phasing style, not a signal.

Technically, yellow trap is not a phasing still, but rather is a result of particular phase combinations.

Conceptually, "yellow trap phasing" could be when an agency specifically implements a yellow trap as part of regular phasing. That's not something you really see anymore, but it could have been at one point. Nowadays it's a mistake, but at one point it may have been intentional.

It's not a phase style though. Phase styles would be something like split phasing, lead-lag left turns, or larger concepts like a TTI-4 phase (a specific sequence of phases used at both signals some diamond interchanges to keep the middle relatively clear).

Yellow trap is a specific result of lead-lag PPLT phasing where the old 5-section displays were used.

[kphoger]

It's like the difference between liberty and freedom.  Liberty is granted by the authority, and freedom is what you enjoy as a result.  Freedom can also be enjoyed by different means (during a hike through Bir Tawil, for example).

Bad signal phasing is a construct implemented by an agency, and yellow trap is what you enjoy as a result.  Yellow trap can also be enjoyed by different means (due to a mistake in signal timing, for example.).

[jakeroot]

I see, I see. Phasing error, not style.

[NoGoodNamesAvailable]

While browsing street view, I found what must be one of the strangest signal heads in the US: a straight-through and left turn arrow together in a cross shape! I don't know how signal jurisdiction works in Massachussets, but this is on a state route–it's pretty crazy that a state DOT would allow an installation like this, but knowing MassDOT I can't say I'm surprised.

[Big John]

^^ Those have been banned in the MUTCD since the 1970s

[SignBridge]

Well LOL All bets are off when we're talking about Massachusetts!

[jakeroot]

Well LOL All bets are off when we're talking about Massachusetts!

Agreed. Mass (though it doesn't bother me) still installs flashing green signals, so even if this was installed after the ban, it wouldn't surprise me.

[Amtrakprod]

I'm gonna have to get some pictures of that light!

[Rothman]

While browsing street view, I found what must be one of the strangest signal heads in the US: a straight-through and left turn arrow together in a cross shape! I don't know how signal jurisdiction works in Massachussets, but this is on a state route–it's pretty crazy that a state DOT would allow an installation like this, but knowing MassDOT I can't say I'm surprised.

There is a similar light in Sandusky, OH.  Got a picture of it somewhere.

[traffic light guy]

While browsing street view, I found what must be one of the strangest signal heads in the US: a straight-through and left turn arrow together in a cross shape! I don't know how signal jurisdiction works in Massachussets, but this is on a state route–it's pretty crazy that a state DOT would allow an installation like this, but knowing MassDOT I can't say I'm surprised.

The model of the signal shown is an Alusig. So these signals were installed after the MUTCD banned the double arrow

LG-M327

[Amtrakprod]

While browsing street view, I found what must be one of the strangest signal heads in the US: a straight-through and left turn arrow together in a cross shape! I don't know how signal jurisdiction works in Massachussets, but this is on a state route–it's pretty crazy that a state DOT would allow an installation like this, but knowing MassDOT I can't say I'm surprised.

The model of the signal shown is an Alusig. So these signals were installed after the MUTCD banned the double arrow

LG-M327

MassDot ia like f*** the MUTCD:
Proof: https://www.google.com/maps/@42.5381397,-70.9357007,3a,20.3y,148.96h,92.79t/data=!3m6!1e1!3m4!1szYmm3ChGipzRGDkz-wLmMg!2e0!7i13312!8i6656
https://www.google.com/maps/@42.1069514,-72.6231577,3a,31.6y,62.29h,93.65t/data=!3m6!1e1!3m4!1sc-SAIn8frJeJ0QOtiOrb1g!2e0!7i13312!8i6656
This one is fine but I think this sign may be a bit redundent, even for MA: https://www.google.com/maps/@42.0906584,-72.6262897,3a,33.5y,18.99h,100.17t/data=!3m6!1e1!3m4!1snLZUrr0WGiNRDDOUW2ZBBA!2e0!7i13312!8i6656
And this: Screen Shot 2018-12-28 at 3.22.11 PM by Petru Sofio, on Flickr

[ErmineNotyours]

Can't seem to find the thread were someone was complaining about ped signals hung on wires.  Here's another example from Seattle, another installation that's been replaced by pole-mounted signals.

Wire-mounted pedestrain signal by Arthur Allen, on Flickr

[Big John]

^^ That was a MUTCD no-no

Section 4E.05 Location and Height of Pedestrian Signal Heads

Standard:
01 Pedestrian signal heads shall be mounted with the bottom of the signal housing including brackets not less than 7 feet or more than 10 feet above sidewalk level, and shall be positioned and adjusted to provide maximum visibility at the beginning of the controlled crosswalk.

[steviep24]

While browsing street view, I found what must be one of the strangest signal heads in the US: a straight-through and left turn arrow together in a cross shape! I don't know how signal jurisdiction works in Massachussets, but this is on a state route–it's pretty crazy that a state DOT would allow an installation like this, but knowing MassDOT I can't say I'm surprised.

The model of the signal shown is an Alusig. So these signals were installed after the MUTCD banned the double arrow

LG-M327

MassDot ia like f*** the MUTCD:
Proof: https://www.google.com/maps/@42.5381397,-70.9357007,3a,20.3y,148.96h,92.79t/data=!3m6!1e1!3m4!1szYmm3ChGipzRGDkz-wLmMg!2e0!7i13312!8i6656
https://www.google.com/maps/@42.1069514,-72.6231577,3a,31.6y,62.29h,93.65t/data=!3m6!1e1!3m4!1sc-SAIn8frJeJ0QOtiOrb1g!2e0!7i13312!8i6656
This one is fine but I think this sign may be a bit redundent, even for MA: https://www.google.com/maps/@42.0906584,-72.6262897,3a,33.5y,18.99h,100.17t/data=!3m6!1e1!3m4!1snLZUrr0WGiNRDDOUW2ZBBA!2e0!7i13312!8i6656
And this: Screen Shot 2018-12-28 at 3.22.11 PM by Petru Sofio, on Flickr

Or flashing green lights/arrows as seen in this video.

[hotdogPi]

Or flashing green lights/arrows as seen in this video.

Why didn't that signal notice the overheight truck and change to red?

[Amtrakprod]

Or flashing green lights/arrows as seen in this video.

Why didn't that signal notice the overheight truck and change to red?

I've been trying to figure out what that signal does for a long time, still have no idea, may email WestWood,


iPhone

[jakeroot]

^^
It's possible the signal isn't tied to the undercrossing.