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Traffic signal

Started by Tom89t, January 14, 2012, 01:01:45 AM

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kphoger

Quote from: thenetwork on April 07, 2025, 04:42:56 PMThey have a few 3-segment traffic signals for the trains on some of the freight railroad crossings in the Central Denver area as well.

Is that what this 4-segment one is?
https://maps.app.goo.gl/TKwQ9yB9M4ZuYgiH7

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Male pronouns, please.

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thenetwork

Quote from: kphoger on April 07, 2025, 04:52:38 PM
Quote from: thenetwork on April 07, 2025, 04:42:56 PMThey have a few 3-segment traffic signals for the trains on some of the freight railroad crossings in the Central Denver area as well.

Is that what this 4-segment one is?
https://maps.app.goo.gl/TKwQ9yB9M4ZuYgiH7

Yes.  It's been a while since I was off the freeways in that area.  They may all be 4-segment signals with the double red, but I thought I saw a few 3-segments.

PColumbus73

What is your favorite signal manufacturer / style?

Mine would be the old aluminum Econolite button backs, like this or these

Second would be older McCains, specifically for the cap visors like these

Least favorite would be the LTE 'nipple backs' like these

Or the super rounded GTE's like this

freebrickproductions

Old single-face Crouse-hinds "Art-deco" heads always look cool. I also love the look of the GE Streamline and Econolite Bullseye heads, especially the round-door variants of the latter. 12 inch aluminum LFE signals also always look nice, IMHO, and I'm always a fan of 12 inch Winkomatic signals too.

Unsurprisingly, most of these also feature in my collection. :bigass:
It's all fun & games until someone summons Cthulhu and brings about the end of the world.

I also collect traffic lights, road signs, fans, and railroad crossing equipment.

Art in avatar by Moncatto (18+)!

(They/Them)

CJResotko

Quote from: PColumbus73 on April 10, 2025, 12:24:46 PMWhat is your favorite signal manufacturer / style?
My favorite signals are Crouse Hinds art decos, Eagleluxes, Econolite groove-backs and bullseyes, General Electric streamlines and Novaluxes, and any 16-inch worded pedestrian signal and fixed 4-way.
*insert something witty here*

PColumbus73

Quote from: CJResotko on April 10, 2025, 09:18:07 PM
Quote from: PColumbus73 on April 10, 2025, 12:24:46 PMWhat is your favorite signal manufacturer / style?
My favorite signals are Crouse Hinds art decos, Eagleluxes, Econolite groove-backs and bullseyes, General Electric streamlines and Novaluxes, and any 16-inch worded pedestrian signal and fixed 4-way.

I like the older 8" Econolites with the extra wide backplate that is/was common in California.

bcroadguy

At this intersection in Quebec, there is a pedestrian countdown timer, but no hand / man :-o

https://maps.app.goo.gl/JCdxkcetU3fDd4Ef6

signalman

Quote from: bcroadguy on April 27, 2025, 05:45:52 AMAt this intersection in Quebec, there is a pedestrian countdown timer, but no hand / man :-o

https://maps.app.goo.gl/JCdxkcetU3fDd4Ef6
The countdown timers seem to be adjoined to the signal above them. Turning down the side street in GSV reveals a green light for the side street and 22 seconds on the timer. This is a very useful tool in the case of a standard signal being utilized as a ped signal. As the pedestrian approaches, they can quickly and easily see if they have enough time to cross before the light changes.

jakeroot

Quote from: signalman on April 27, 2025, 06:37:12 AM
Quote from: bcroadguy on April 27, 2025, 05:45:52 AMAt this intersection in Quebec, there is a pedestrian countdown timer, but no hand / man :-o

https://maps.app.goo.gl/JCdxkcetU3fDd4Ef6
The countdown timers seem to be adjoined to the signal above them. Turning down the side street in GSV reveals a green light for the side street and 22 seconds on the timer. This is a very useful tool in the case of a standard signal being utilized as a ped signal. As the pedestrian approaches, they can quickly and easily see if they have enough time to cross before the light changes.

I suspect your interpretation of the situation is correct. The funny thing is, in practice, this is essentially just a countdown timer for vehicles. If I was a driver and I saw a timer directly adjacent to a green signal, I would just assume that was a countdown timer for the signal. Of course, essentially, it is, but such a thing is extremely rare if not totally vertboten across North America. I don't know if Canada (or Quebec) expressly bans it like the MUTCD does, even if we have accidentally started to allow it with pedestrian countdown timers.

LilianaUwU

Quote from: jakeroot on April 28, 2025, 07:25:00 PM
Quote from: signalman on April 27, 2025, 06:37:12 AM
Quote from: bcroadguy on April 27, 2025, 05:45:52 AMAt this intersection in Quebec, there is a pedestrian countdown timer, but no hand / man :-o

https://maps.app.goo.gl/JCdxkcetU3fDd4Ef6
The countdown timers seem to be adjoined to the signal above them. Turning down the side street in GSV reveals a green light for the side street and 22 seconds on the timer. This is a very useful tool in the case of a standard signal being utilized as a ped signal. As the pedestrian approaches, they can quickly and easily see if they have enough time to cross before the light changes.

I suspect your interpretation of the situation is correct. The funny thing is, in practice, this is essentially just a countdown timer for vehicles. If I was a driver and I saw a timer directly adjacent to a green signal, I would just assume that was a countdown timer for the signal. Of course, essentially, it is, but such a thing is extremely rare if not totally vertboten across North America. I don't know if Canada (or Quebec) expressly bans it like the MUTCD does, even if we have accidentally started to allow it with pedestrian countdown timers.

My interpretation, having lived in Québec all my life, is that it's Saguenay doing whatever they want, Tome V be damned.
"Volcano with no fire... Not volcano... Just mountain."
—Mr. Thwomp

My pronouns are she/her. Also, I'm an admin on the AARoads Wiki.



mrsman

Interesting new signal timing that I've noticed more and more in my area (suburban Maryland outside of Washington DC)

It seems like they are introducing more and more leading pedestrian intervals.  This is where the WALK sign goes on for about 3-7 seconds before the parallel green.  The idea is that if pedestrians get a head start, they will already be in the intersection and easier for drivers to see when cars are making turns.  The application of this is pretty straightforward at regular intersections or at intersections with a lagging green arrow. 

What about intersections with a leading green arrow?  If the leading green arrow is only one direction, first they have a red light with a green arrow and a WALK signal on the right.  A few seconds later, green light with green arrow, with a WALK signal on the right.  After the green arrow and yellow arrow are extinguished, opposing crosswalk gets a WALK signal and then a few seconds later opposing traffic gets a green.

Another weird aspect is that even at T-intersections, they are imposing this timing.  So I see a red signal with green arrow, even though there is a continuous sidewalk on my right.  I don't get it.  No right turns are available here, why delay the green?

roadfro

Quote from: mrsman on July 13, 2025, 08:42:59 AMAnother weird aspect is that even at T-intersections, they are imposing this timing.  So I see a red signal with green arrow, even though there is a continuous sidewalk on my right.  I don't get it.  No right turns are available here, why delay the green?
They probably accidentally put in leading ped interval information to the controller for all the vehicle phases without realizing that some phases (e.g. the through phase at the top of the "T") wouldn't need it. I'd guess signal techs could fix this if reported.
Roadfro - AARoads Pacific Southwest moderator since 2010, Nevada roadgeek since 1983.

tradephoric

#5514

Drivers who make it through the light at the FL56 & I-75 DDI have to travel around 500 feet before they clear the I-75 off-ramp intersection.  Presumably there is a very large clearance interval to allow traffic along FL56 to clear before the I-75 off ramp traffic gets their green light (important to note there is no far mast-arm at the off-ramp for traffic along FL56).  But if FL56 is backed up and driving slowly that seems problematic.  There would be no indication for FL56 drivers that the off-ramp has a green light as FL56 traffic may still be trying to clear the intersection.  This situation is allowed in the MUTCD?  This signal design seems crazy.

Consider this... the pedestrian crosswalk is 386 feet upstream from the stop-bar and 227 feet upstream from the mast arm.  Pedestrians could get a walk and drivers along FL56 would be none the wiser that they really need to stop for the pedestrian crossing the road.

chrisg69911

Quote from: tradephoric on July 16, 2025, 10:20:12 PM
Drivers who make it through the light at the FL56 & I-75 DDI have to travel around 500 feet before they clear the I-75 off-ramp intersection.  Presumably there is a very large clearance interval to allow traffic along FL56 to clear before the I-75 off ramp traffic gets their green light (important to note there is no far mast-arm at the off-ramp for traffic along FL56).  But if FL56 is backed up and driving slowly that seems problematic.  There would be no indication for FL56 drivers that the off-ramp has a green light as FL56 traffic may still be trying to clear the intersection.  This situation is allowed in the MUTCD?  This signal design seems crazy.

Consider this... the pedestrian crosswalk is 386 feet upstream from the stop-bar and 227 feet upstream from the mast arm.  Pedestrians could get a walk and drivers along FL56 would be none the wiser that they really need to stop for the pedestrian crossing the road.

Jesus, florida needs to calm down with the lanes, 6 lanes is ridiculous, and that stupid crosswalk half a mile away from the light



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