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Traffic signal

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

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roadman65

https://live.staticflickr.com/65535/52097637546_2af436304a_4k.jpg
This one near the Johnson Space Center in Webster, TX is unusual.


Only one signal head for a double left turn setup.
Every day is a winding road, you just got to get used to it.

Sheryl Crowe


roadfro

Quote from: roadfro on May 26, 2022, 12:48:46 PM
Quote from: kphoger on May 19, 2022, 09:37:01 AM
Quote from: San Francisco Municipal Transportation Agency
Upgrading the T: Weigh in on a New Type of Train Signal on 3rd Street
Rachel Hyden, 22—FEB-2017

Implementing a Standard, Concise Design for Train Signals


Currently, Muni trains are guided by three different types of train signals. We're in the process of upgrading 400 signals along the T Line to one uniform system within the next few months.


The three designs used for existing train signals (left) which will be consolidated into one standard type of signal (right).

Very interesting that they decided to use red in the final design. The third pattern (with the two white bars) they're changing out is the only one of these that is MUTCD-compliant.
Quote from: SignBridge on May 26, 2022, 07:54:15 PM
Does Calif. have a State Supplement to the Federal Manual? If they do, does it maybe authorize the red stop bar to be used?

California actually has a state MUTCD.

The most recent CA MUTCD states in section 8C.11 that all LRT signal indications should be as shown in Figure 8C-3(CA), and that figure notes that all indications are white. However, section 8C.11 is a guidance statement and not a standard, so technically they can get away with using the red I guess.

Also of note: Figure 8C-3(CA) is a modification of the national MUTCD Figure 8C-3 that eliminates the standard three-section LRT signal display as an option.
Roadfro - AARoads Pacific Southwest moderator since 2010, Nevada roadgeek since 1983.

SignBridge

Roadfro, maybe you can clarify for me: I thought California had abolished their State Traffic Manual some time ago and went with the Federal MUTCD. Am I mistaken about that?

roadfro

Quote from: SignBridge on May 28, 2022, 08:20:41 PM
Roadfro, maybe you can clarify for me: I thought California had abolished their State Traffic Manual some time ago and went with the Federal MUTCD. Am I mistaken about that?

You are mistaken. California has way too many state-specific practices and vehicle code peculiarities (e.g. yellow crosswalk markings for school zones) to go with vanilla MUTCD.

California adopted a state MUTCD in 2006, which was based on the 2003 Federal MUTCD. Basically they took the Federal MUTCD and insert/strike-out text and figures as appropriate to California--and they have a "substantial conformance" from FHWA for it. There are many parts of the CA MUTCD where there are a lot of inserts of policies or state-specific information, which I think is how they incorporated a great deal of the information that had been in the State Traffic Manual. (They're now on 2014 CA MUTCD revision 6, based on the 2009 Federal MUTCD 2012 revision.)
Roadfro - AARoads Pacific Southwest moderator since 2010, Nevada roadgeek since 1983.

jakeroot

Quote from: SignBridge on May 28, 2022, 08:20:41 PM
Roadfro, maybe you can clarify for me: I thought California had abolished their State Traffic Manual some time ago and went with the Federal MUTCD. Am I mistaken about that?

I'm a bit surprised, of all users, that you'd think California uses the federal MUTCD. From their guide signs, to traffic signals, to route markers and road markings, California has a substantial number of unique practices and standards.

SignBridge

You're right Jakeroot. Guess I was having a senior moment. LOL It's been twelve years since I last visited California so I guess I'd kind of forgotten how that state is almost like a separate country in a lot of their practices.

And thanks Roadfro for your detailed update. It's all good!

Lukeisroads


plain

Quote from: Lukeisroads on June 08, 2022, 02:16:13 PM
Oh Bakersfield what am i gonna do with you https://www.google.com/maps/@35.2741154,-119.0389599,3a,75y,48.93h,90t/data=!3m6!1e1!3m4!1sRn9H2p_Gyd7sXDAA2SYA3g!2e0!7i16384!8i8192

It almost looks like they switched the configuration at that intersection at some point for that particular setup to look like that.

I'm using my phone so I can't go back in time on GSV to see what that intersection looked like a few years ago.
Newark born, Richmond bred

kphoger

Quote from: plain on June 08, 2022, 02:35:44 PM

Quote from: Lukeisroads on June 08, 2022, 02:16:13 PM
Oh Bakersfield what am i gonna do with you https://www.google.com/maps/@35.2741154,-119.0389599,3a,75y,48.93h,90t/data=!3m6!1e1!3m4!1sRn9H2p_Gyd7sXDAA2SYA3g!2e0!7i16384!8i8192

It almost looks like they switched the configuration at that intersection at some point for that particular setup to look like that.

I'm using my phone so I can't go back in time on GSV to see what that intersection looked like a few years ago.

It wasn't signalized at all.
Keep right except to pass.  Yes.  You.
Visit scenic Orleans County, NY!
Male pronouns, please.

Quote from: Philip K. DickIf you can control the meaning of words, you can control the people who must use them.

plain

Quote from: kphoger on June 08, 2022, 02:37:36 PM
Quote from: plain on June 08, 2022, 02:35:44 PM

Quote from: Lukeisroads on June 08, 2022, 02:16:13 PM
Oh Bakersfield what am i gonna do with you https://www.google.com/maps/@35.2741154,-119.0389599,3a,75y,48.93h,90t/data=!3m6!1e1!3m4!1sRn9H2p_Gyd7sXDAA2SYA3g!2e0!7i16384!8i8192

It almost looks like they switched the configuration at that intersection at some point for that particular setup to look like that.

I'm using my phone so I can't go back in time on GSV to see what that intersection looked like a few years ago.

It wasn't signalized at all.

Oh ok, thanks!

For that particular signal he posted I now think they placed the full length mast arm there just in case they decide to widen the street east of there and need to shift the signals to match it.
Newark born, Richmond bred

steviep24

#4560
Quote from: plain on June 08, 2022, 03:22:56 PM
Quote from: kphoger on June 08, 2022, 02:37:36 PM
Quote from: plain on June 08, 2022, 02:35:44 PM

Quote from: Lukeisroads on June 08, 2022, 02:16:13 PM
Oh Bakersfield what am i gonna do with you https://www.google.com/maps/@35.2741154,-119.0389599,3a,75y,48.93h,90t/data=!3m6!1e1!3m4!1sRn9H2p_Gyd7sXDAA2SYA3g!2e0!7i16384!8i8192

It almost looks like they switched the configuration at that intersection at some point for that particular setup to look like that.

I'm using my phone so I can't go back in time on GSV to see what that intersection looked like a few years ago.

It wasn't signalized at all.

Oh ok, thanks!

For that particular signal he posted I now think they placed the full length mast arm there just in case they decide to widen the street east of there and need to shift the signals to match it.
That's like what they did with this intersection in Rochester, NY. Note that the street to the left isn't built yet.

https://www.google.com/maps/@43.1097764,-77.5746501,3a,75y,340.03h,90t/data=!3m6!1e1!3m4!1stDb6YLfWm2QB7iCYgcywLw!2e0!7i16384!8i8192?hl=en&authuser=0

EDIT: Going the opposite direction there is a mast arm with no signals attached.

https://www.google.com/maps/@43.1098818,-77.5745936,3a,75y,208.61h,90t/data=!3m6!1e1!3m4!1sz29YPlwY-YbQ-ZMqno6k1g!2e0!7i16384!8i8192?hl=en&authuser=0

On another note, just past this intersection is a diverging diamond interchange.

Lukeisroads

Quote from: plain on June 08, 2022, 03:22:56 PM
Quote from: kphoger on June 08, 2022, 02:37:36 PM
Quote from: plain on June 08, 2022, 02:35:44 PM

Quote from: Lukeisroads on June 08, 2022, 02:16:13 PM
Oh Bakersfield what am i gonna do with you https://www.google.com/maps/@35.2741154,-119.0389599,3a,75y,48.93h,90t/data=!3m6!1e1!3m4!1sRn9H2p_Gyd7sXDAA2SYA3g!2e0!7i16384!8i8192

It almost looks like they switched the configuration at that intersection at some point for that particular setup to look like that.

I'm using my phone so I can't go back in time on GSV to see what that intersection looked like a few years ago.

It wasn't signalized at all.

Oh ok, thanks!

For that particular signal he posted I now think they placed the full length mast arm there just in case they decide to widen the street east of there and need to shift the signals to match it.
Well at old river and panama The same story happens https://www.google.com/maps/@35.2963581,-119.1098749,3a,15y,194.17h,93.91t/data=!3m7!1e1!3m5!1sfn39mD1gldxKziwByz2OLw!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3Dfn39mD1gldxKziwByz2OLw%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D297.42096%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192

kphoger

Keep right except to pass.  Yes.  You.
Visit scenic Orleans County, NY!
Male pronouns, please.

Quote from: Philip K. DickIf you can control the meaning of words, you can control the people who must use them.


Scott5114

Here's a kinda neat disused traffic signal mount in Lysychansk, Ukraine. (If you click over to the other side of the intersection, you can see that one of the signal heads is smashed, and the fourth is entirely missing.)
uncontrollable freak sardine salad chef

jay8g

I've noticed the way-too-long mast arm trend starting to infect Seattle too in the past few years. This intersection is one of the worst -- the mast arms extend across nearly the entire street.

zachary_amaryllis

Quote from: jay8g on June 12, 2022, 02:59:23 AM
I've noticed the way-too-long mast arm trend starting to infect Seattle too in the past few years. This intersection is one of the worst -- the mast arms extend across nearly the entire street.

it's interesting to note, that one could theoretically pass on that road with the dotted line..
clinched:
I-64, I-80, I-76 (west), *64s in hampton roads, 225,270,180 (co, wy)

jakeroot

Grabbed a quick picture of a brand new protected left turn in North Vancouver, BC.

This will end up being one of the last signals with 8-inch lenses, as the new BC MOTI manual now requires 12-inch lenses. While I understand the idea, the near-side signals really don't need to be 12-inches; the other two far-side signals are probably best as 12-inches all-around (as opposed to just the green arrow):


BC Left Turn Signal by Jacob Root, on Flickr

Caps81943

#4568
Found some unique phasing near Midland, TX. Would anyone know how this works? Streetview doesn't help much.

https://www.google.com/maps/@32.0352566,-102.0587668,3a,75y,97.89h,92.23t/data=!3m6!1e1!3m4!1s0Tibwg0tOxWvHHgVW1_zWw!2e0!7i16384!8i8192

kphoger

Quote from: Caps81943 on June 16, 2022, 12:40:14 AM
Found some unique phasing near Midland, TX. Would anyone know how this works? Streetview doesn't help much.

How in Helsinki do you expect us to know what you're talking about?
Keep right except to pass.  Yes.  You.
Visit scenic Orleans County, NY!
Male pronouns, please.

Quote from: Philip K. DickIf you can control the meaning of words, you can control the people who must use them.

Caps81943

Well I'm an idiot and forgot to paste the link. :spin: Should be there now, my bad

SignBridge

Quote from: Caps81943 on June 16, 2022, 08:06:46 PM
Well I'm an idiot and forgot to paste the link. :spin: Should be there now, my bad

Nope.

Caps81943

Quote from: SignBridge on June 16, 2022, 08:10:03 PM
Quote from: Caps81943 on June 16, 2022, 08:06:46 PM
Well I'm an idiot and forgot to paste the link. :spin: Should be there now, my bad

Nope.

What is going on? To me it shows it is in my original comment. If the rest of y'all cannot see it, I'll paste it again.

https://www.google.com/maps/@32.0352566,-102.0587668,3a,75y,97.89h,92.23t/data=!3m6!1e1!3m4!1s0Tibwg0tOxWvHHgVW1_zWw!2e0!7i16384!8i8192

US71

Quote from: Caps81943 on June 16, 2022, 11:11:25 PM
Quote from: SignBridge on June 16, 2022, 08:10:03 PM
Quote from: Caps81943 on June 16, 2022, 08:06:46 PM
Well I'm an idiot and forgot to paste the link. :spin: Should be there now, my bad

Nope.

What is going on? To me it shows it is in my original comment. If the rest of y'all cannot see it, I'll paste it again.

https://www.google.com/maps/@32.0352566,-102.0587668,3a,75y,97.89h,92.23t/data=!3m6!1e1!3m4!1s0Tibwg0tOxWvHHgVW1_zWw!2e0!7i16384!8i8192

Came through for me. Never seen a Flashing Yellow ball sign before.
Like Alice I Try To Believe Three Impossible Things Before Breakfast

riiga

Quote from: jakeroot on June 15, 2022, 01:31:16 AM
Grabbed a quick picture of a brand new protected left turn in North Vancouver, BC.

[...]
Why not just use arrows for protected turns? And get rid of those ridiculous "Left Turn Signal" signs.



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