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Traffic signal

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

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SignBridge

There needs to be a second circular green signal, as two are required for the straight thru route. Surprising they would have omitted that as this is a relatively new installation.


roadman65

Appears that New  Jersey is using exclusively the four section permissive signal heads with the arrows for both yellow and green in the same section.

No signs of FLYA anywhere.  I'm guessing this is the official left turn signals for those turns and the green ball over the left lane is the normal phase when yielding is required.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

roadman65

https://www.flickr.com/photos/54480415@N08/54265084398/
Heres one where the Garden State is still not using an arrow to denote the protected left turn here as this is a split phased signal and the center lane is for continuous use of left turn or straight through.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

jakeroot

Quote from: roadman65 on January 13, 2025, 04:50:57 PMhttps://www.flickr.com/photos/54480415@N08/54265084398/
Heres one where the Garden State is still not using an arrow to denote the protected left turn here as this is a split phased signal and the center lane is for continuous use of left turn or straight through.

I don't understand how you can conclude that New Jersey is "still not using [arrows]..." when you are referring to a signal installation that is clearly not new. If this was a brand-new intersection, I'd understand your point, but an old installation is not usually indicative of current practices.

roadman65

Quote from: jakeroot on January 13, 2025, 05:17:09 PM
Quote from: roadman65 on January 13, 2025, 04:50:57 PMhttps://www.flickr.com/photos/54480415@N08/54265084398/
Heres one where the Garden State is still not using an arrow to denote the protected left turn here as this is a split phased signal and the center lane is for continuous use of left turn or straight through.

I don't understand how you can conclude that New Jersey is "still not using [arrows]..." when you are referring to a signal installation that is clearly not new. If this was a brand-new intersection, I'd understand your point, but an old installation is not usually indicative of current practices.

Im saying that the state has not gotten around to changing these out for the new arrows.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

roadman65

https://www.flickr.com/photos/54480415@N08/54283672264
This one in West Chester, PA has a side mount for pedestrians instead of standard crosswalk heads.

What gets me is it has panels in front of the green lens to prevent drivers from seeing it even though the small 8-8-8 works with the main 12-12-12 overhead signals.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

freebrickproductions

I've noticed Pennsylvania likes to do that a lot more than most other states. Traditionally, they'd use the 8 inch 3M adapters, but these days they primarily use louvers like the ones there for limiting the visibility of them.
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.

(They/Them)

thenetwork

I have NEVER seen nor heard of a 5-segment overhead vertical traffic signal in California..
But here it is...

https://www.facebook.com/share/p/19pWyy4pku/

PColumbus73


fwydriver405

#5434
Quote from: thenetwork on January 28, 2025, 07:50:52 PMI have NEVER seen nor heard of a 5-segment overhead vertical traffic signal in California..
But here it is...

https://www.facebook.com/share/p/19pWyy4pku/

Definitely saw at least one during my time near San Jose in 2024 and now 2025...

SB Wolfe Rd LT lane, Sunnyvale

And then there are these two in Guerneville:
CA 116 at First St / Armstrong Woods Rd (this one also has the double green balls on the Armstrong Woods Rd approach)
CA 116 (River Rd at Gravenstein Hwy)

And one more in Rancho Cordova:
Mather Field Rd at Folsom Rd

PColumbus73

Whenever I go browsing on Streetview in California, I like to look for side-mounted 5-sections clustered together. I.e. 2 or more 5-sections side-mounted on one pole.

roadman65

https://www.flickr.com/photos/54480415@N08/54301392603
What again is the name of this signal head where one section has both yellow and green arrow for permissive turns?

As you can see I captured it in a yellow phase, but they're common in New Jersey and some other places.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

SignBridge

Can't remember the name, but I've never liked it. Always thought it was safer for the light to physically change position in the head when going from green to yellow arrow. Cost-cutting vs. safety (maybe?) It would be interesting to know how much (if any) difference it makes to most drivers.

Big John

^^ Called bi-modal.

thenetwork

Quote from: SignBridge on February 01, 2025, 09:07:16 PMCan't remember the name, but I've never liked it. Always thought it was safer for the light to physically change position in the head when going from green to yellow arrow. Cost-cutting vs. safety (maybe?) It would be interesting to know how much (if any) difference it makes to most drivers.

Ive seen variations of bi-modals.   There was a signal in Akron that once had a bi-modal left green/yellow arrow in a 3M head back in the early 90s.  Morris Illinois had a variation as well which either used fiber-optics or very early small LED lights for the yellow and green arrow bi-modal heads, also used in the 90s.

jeffandnicole

Quote from: SignBridge on February 01, 2025, 09:07:16 PMCan't remember the name, but I've never liked it. Always thought it was safer for the light to physically change position in the head when going from green to yellow arrow. Cost-cutting vs. safety (maybe?) It would be interesting to know how much (if any) difference it makes to most drivers.

There's a lot that goes into costs, but having a single light switch colors is almost going to be more expensive than just having an ordinary light with a light bult behind the lens turning on and off. Today it's all LEDs but probably same difference.  For the arrows, in the past it used fiber optics but now they're LEDs as well.

NJ has used these arrows for 30+ years, and compared to other states (or even within the state, as there are more traditional doghouse assemblies used), I'm not aware of any issues using one style vs. another.

roadman65

https://www.flickr.com/photos/54480415@N08/54303513252
I find this assembly interesting. Back to back signal heads with 8-8-8 on one side and 12-12-12 in the flip side for the profile view signal.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

Big John

Quote from: roadman65 on February 03, 2025, 09:40:50 AMhttps://www.flickr.com/photos/54480415@N08/54303513252
I find this assembly interesting. Back to back signal heads with 8-8-8 on one side and 12-12-12 in the flip side for the profile view signal.
The odd part is that the 12s are on the near side and the 8s are on the far side, as current MUTCD standards allow for the opposite, as can be seen in Milwaukee.

jeffandnicole

Quote from: Big John on February 03, 2025, 10:27:10 AM
Quote from: roadman65 on February 03, 2025, 09:40:50 AMhttps://www.flickr.com/photos/54480415@N08/54303513252
I find this assembly interesting. Back to back signal heads with 8-8-8 on one side and 12-12-12 in the flip side for the profile view signal.
The odd part is that the 12s are on the near side and the 8s are on the far side, as current MUTCD standards allow for the opposite, as can be seen in Milwaukee.

This is an older signal setup, and NJ practices at the time would use 8" for a minor road. In this case the minor road is lot access to a DuPont facility.

There have been numerous examples of 8"/12" signal setups like this throughout the state, although they are diminishing as the State generally switches to all 12" lights.

roadman65

Yeah I'm seeing. Newer installations are going two heads per side. Plus the left side head still in use.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

SignBridge

#5445
Nassau County, NY on Long Island uses diagonal spans that often have 12-inch faces for the main road and 8-inch faces for the smaller intersecting street, combined in one head. They stubbornly continue this practice instead of just using all 12-inch in new and rebuilt installations.

fwydriver405

Flashing green beacon for a ramp meter on the Los Feliz Blvd on-ramp to I-5 North in Los Angeles, CA - in this case, the leftmost lane is an HOV lane which does not stop, while the centre and rightmost lane are metered. Not sure if the green beacon still blinks or is solid to this day in operation.

Streetview
In operation, 10 Feb 2020

SignBridge

I don't believe the MUTCD allows flashing green lights, although Massachusetts may still have some older ones that indicate a pre-emption signal.

hotdogPi

Quote from: SignBridge on February 05, 2025, 07:37:25 PMI don't believe the MUTCD allows flashing green lights, although Massachusetts may still have some older ones that indicate a pre-emption signal.

They're slowly going away, but a few still remain.
Clinched

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fwydriver405

Quote from: SignBridge on February 05, 2025, 07:37:25 PMI don't believe the MUTCD allows flashing green lights, although Massachusetts may still have some older ones that indicate a pre-emption signal.

... and a few pedestrian crossing signals as well, though most are being changed out for flashing yellow, PHBs, or other treatment.



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