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National Boards => General Highway Talk => Topic started by: formulanone on October 04, 2011, 09:20:36 AM

Title: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: formulanone on October 04, 2011, 09:20:36 AM
While we're on subject of mast arms, how about this color, as used in Immokalee, Florida?

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.formulanone.org%2Fwp-content%2Fuploads%2F2011%2F10%2FBlueLightPolesImmokalee.jpg&hash=b2995519fad4dc6886a905cfd45a262e6b4dad5c)


Title: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: jwolfer on October 04, 2011, 11:16:41 AM
Quote from: formulanone on October 04, 2011, 09:20:36 AM
While we're on subject of mast arms, how about this color, as used in Immokalee, Florida?

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.formulanone.org%2Fwp-content%2Fuploads%2F2011%2F10%2FBlueLightPolesImmokalee.jpg&hash=b2995519fad4dc6886a905cfd45a262e6b4dad5c)




Duval County FL (Jacksonville) used black for the mast arms when they first started using them instead of the concrete poles with guy wires. But now they are just plain metal.  Clay and St Johns seem to use brown mast arms. Clay County uses concrete and guy wires much more than Duval. ( I think it is FDOT spec that close to the coast mast arms muse be used... I read something to that effect one time but I have no idea where :)
)   Volusia County has some mast arms painted green
Title: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: formulanone on October 04, 2011, 11:28:54 AM
Well, they do hold up to hurricane-force winds better than cabled traffic signals did...which is kind of moot when there's no power for the first few days, and they're all blacked-out or run by portable generators. And then it takes another 2-3 months to configure the timing of the intersections to prevent gridlock...fun times. :(

I've noticed every newly-redesigned intersection or all-new traffic signals in South Florida has used the arms for the past 15 years or so. Most of the painted arms tend to peel after 6 months, which looks a little ratty, in my opinion. But I've seen green, black, brown, white, aluminum...that was the first blue one I've ever seen.

I had to bork the camels' back, didn't I?
Title: Re: Color of Signal Mast Arms
Post by: Alex on October 04, 2011, 11:42:05 AM
I split the topic from the original "Signage/Gantries Off Kilter" thread to continue the discussion of signal mast arm colors.

When I first saw mast-arms being used in Florida, the assemblies were painted with a dark brown/black color. The first assembly I noted was on US 90 (Scenic Highway) at Langley Avenue in Pensacola during summer of 1999.

(https://www.aaroads.com/southeast/florida090/us-090_wb_at_langley_av.jpg)

That color was used for years, but more recent assemblies in Northwest Florida are unpainted.

Around the state I have noted the all black assemblies and the Disney-purple ones along US 192. As for paint flaking off, there are some wretched mast-arms used along Florida 20 in Niceville.

Span wires are not completely dead, there is a new assembly on the recently-downgraded County Road 290 that utilizing them.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: jwolfer on October 04, 2011, 01:20:33 PM
Quote from: Alex on October 04, 2011, 11:42:05 AM
I split the topic from the original "Signage/Gantries Off Kilter" thread to continue the discussion of signal mast arm colors.

.....


Span wires are not completely dead, there is a new assembly on the recently-downgraded County Road 290 that utilizing them.


The same thing I read about the mast arm requirment said that span wires can be used where the metrics of th intersection make mast arms impractical
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Quillz on October 04, 2011, 01:49:08 PM
Thousand Oaks signal masts are generally a very dark brown or black. A very small number of older sign masts in the S.F. Valley were a dark green, although newer ones are just bare metal.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: twinsfan87 on October 04, 2011, 01:55:26 PM
Here's a few examples from Minnesota:

Minneapolis and Bloomington use yellow and black: http://g.co/maps/2b6px

Hennepin County (all new signals), St. Paul, Duluth use black:http://g.co/maps/qcagz

Typical Mn/DOT signals (except for some new signals that aren't painted at all) and most other cities/counties use yellow poles with plain metal arms: http://g.co/maps/nrshh



Post Merge: October 04, 2011, 09:11:11 PM

Also, Roseville sometimes uses a dark green color too: http://g.co/maps/hmcaf
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Coelacanth on October 04, 2011, 02:09:32 PM
Quote from: twinsfan87 on October 04, 2011, 01:57:04 PM
Also, Roseville sometimes uses a dark green color too: http://g.co/maps/hmcaf
I've always thought of that green as being the "standard" or "normal" color for signals.

But then again, I grew up in Roseville. :)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: myosh_tino on October 04, 2011, 02:36:38 PM
San Jose's mast arms are a very dark green while most other cities in the region leave their signal mast arms unpainted.

Up the peninsula in Menlo Park, their mast arms are brown and have an unusual design...
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.markyville.com%2Faaroads%2FMenloPark.jpg&hash=30afc9a351d7d915269dd00abf47b54ba3b6ba96)

I also ran across this unusual design in Sacramento.  Not sure if they install new signals with this type of mast arm but IIRC, there are a number of these scattered around the Sacramento metro area...
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.markyville.com%2Faaroads%2FSacramento.jpg&hash=7b59aa86d98026d03ea4c02034f0aa88ebc94869)

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.markyville.com%2Faaroads%2FSacramento2.jpg&hash=f56f0aeae8c4dc7d37962665550e22746efeece0)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Quillz on October 04, 2011, 03:34:02 PM
I remember downtown Portland had all-black signal masts, complete with white on black street name blades.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Rick1962 on October 04, 2011, 04:57:34 PM
When Tulsa used double-guy and truss-arms, the standard color was dark green. The city went to galvanized monotube arms in '81,  but there's still a few truss-arms left, with the most recently-painted ones (past 10 years or so) painted dark brown.

The new signals at I-44 & Harvard use black-painted monotubes, to go along with the color scheme of the rest of the hardware on the new I-44 construction.

Oklahoma City's standard has been silver-painted or galvanized mast installations for many years, with a few notable exceptions: Brown-painted installations were used in parts of downtown and along Lincoln Blvd. south of the Capitol.

There were several installations in the west part of downtown that had pinkish-colored masts and arms, and there were a few installations along NW 63rd near Lake Hefner that had copper-painted poles with white mast arms.

Many of the newer signal installations in the City are using black-painted poles.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Ian on October 04, 2011, 05:15:24 PM
Philadelphia likes to install dark brown mast arms and traffic signal poles. Media (as well as quite a bit of other areas around Philadelphia) likes to install black mast arms and traffic signal poles as well as sign posts and even parking signs. There are quite a bit of areas in New England (mostly New Hampshire from what I've seen) that use dark green mast arms to match the signal color.

Quote from: myosh_tino on October 04, 2011, 02:36:38 PM
I also ran across this unusual design in Sacramento.  Not sure if they install new signals with this type of mast arm but IIRC, there are a number of these scattered around the Sacramento metro area...

The signal fans call them "J" arms. Sadly, I don't think these are being installed anymore.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: DRMan on October 04, 2011, 09:46:25 PM
Quote from: PennDOTFan on October 04, 2011, 05:15:24 PM
There are quite a bit of areas in New England (mostly New Hampshire from what I've seen) that use dark green mast arms to match the signal color.

The ones I've seen in NH always looked black to me.  And you don't see them everywhere, although Durham seems to have a lot.

http://g.co/maps/8kn6d (http://g.co/maps/8kn6d)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Ian on October 04, 2011, 09:56:03 PM
They do appear black, but some of them are actually a very, very dark green:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffarm7.static.flickr.com%2F6076%2F6131489439_38b4e1ca28_z.jpg&hash=216c82e761cdfb9132f27a2974c38dc36882e05a)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Brandon on October 04, 2011, 10:56:36 PM
Much of Illinois tends to keep them unpainted.

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi837.photobucket.com%2Falbums%2Fzz298%2Fmidamcrossrds%2F100_1276.jpg&hash=68dcb8cfbf294b37b3ba4afce1cd5f8d6590693b)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi837.photobucket.com%2Falbums%2Fzz298%2Fmidamcrossrds%2F100_1280.jpg&hash=224fc9682900c39027e37d246456ad3a23a59554)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi837.photobucket.com%2Falbums%2Fzz298%2Fmidamcrossrds%2F100_1216.jpg&hash=6d1022fed6fd03902c24f751feca0f6be55971f5)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi837.photobucket.com%2Falbums%2Fzz298%2Fmidamcrossrds%2F100_0882.jpg&hash=e3cfa054d8bef896bf808937181002fb67bd8c0e)

However, they are painted in some areas.  Aurora seems to favor a rusty brown.  Others like a black or dark green.  Then there's Chicago which paints the poles dark green and the arms silver.

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi837.photobucket.com%2Falbums%2Fzz298%2Fmidamcrossrds%2Flsdnorthbegin.jpg&hash=cf42728d0cd7662bb58cb0d84685975f4d9b3f1a)


Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: realjd on October 04, 2011, 11:48:17 PM
Florida is region dependent, but our mast arms in Brevard tend to be unpainted aluminum straight monopoles with vertical signals. Horizontal mount signals are slowly making inroads in traditionally vertical mount parts of the state. It almost seems contractor dependent.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Quillz on October 05, 2011, 12:52:08 AM
BTW, my personal favorite style are the ones in Quebec that used to even have different shapes for the lights. I think I recall it being a red square, yellow triangle and green square. I think most of them are unpainted but they had a very neat look to them.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Ian on October 05, 2011, 06:14:00 AM
Quote from: Quillz on October 05, 2011, 12:52:08 AM
BTW, my personal favorite style are the ones in Quebec that used to even have different shapes for the lights. I think I recall it being a red square, yellow triangle and green square. I think most of them are unpainted but they had a very neat look to them.

Red was square, yellow was diamond, and green was the standard ball. Sucks that they don't do it anymore.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: roadfro on October 05, 2011, 06:44:14 AM
Nevada typically leaves the signal poles unpainted. There are some exceptions:

Areas of Las Vegas have a couple different schemes:
* Newer signal installations near downtown were painted dark green, and are now painted black.
* Signals in the Summerlin area are a light brownish color.
* Older signals all over the valley used to have the bottom half of the pole (up to the pole-mounted signal face) painted the yellowish-orange color of roadway centerlines, and most jurisdictions would paint the rest of the pole and the mast silver. Agencies keep up the yellow paint now, but no longer do this on new installs.

There's a couple different ones around Reno too.
* Older Downtown Reno signals are currently painted black (they were a horrendous purple color).
* Newer Downtown Reno signals are actually a dark green color, but these are a more ornate design than standard poles.
* Signals near Victorian Square in Sparks are painted black.
* There are random signals all over painted a light tan-ish color.

Carson City uses black on signal poles in the capitol district along Carson Street.

Fallon has some green (almost sea green) signals.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: rawmustard on October 05, 2011, 09:08:23 AM
Several of the mast arms in downtown Battle Creek were painted brown when they were originally installed (a couple along Van Buren were unpainted), but some years ago, they were all painted black. The mast arms the city has along Beckley Road are unpainted as are Calhoun County's installations in adjoining Emmett Township.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: US71 on October 05, 2011, 10:02:52 AM
Most in Ft Smith are  primer red  (http://g.co/maps/5apm8), but there are a few  decorative green  (http://g.co/maps/97utv) ones. Some of the newer signals going in are silver.

The rest of Arkansas is primarily silver with a few green ones in select neighborhoods.

Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: on_wisconsin on October 05, 2011, 10:42:40 AM
In Minnesota, MnDOT regularly paints their stop lights. The usual scheme is a yellow support post with the truss arm and street light painted silver.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fimg.photobucket.com%2Falbums%2Fv704%2Fpackerfan386%2F0f3590e5.jpg&hash=ad8840a2f777b57186efc59d3e62f0534e2f3849)
However, many non-MnDOT traffic signals are painted some shade of brown or black.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: pianocello on October 05, 2011, 09:40:15 PM
In the QC, Bettendorf uses yellow mast arms, but all of the other 4 (along with smaller "suburbs") keep theirs metallic silver. Outside the QC, Iowa City and Chicago (IIRC) use green mast arms, similar to the above-mentioned Roseville, MN
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: architect77 on October 06, 2011, 05:20:30 PM
I like unpainted Cali-style best, seen here at NC State's Hillsborough St. in Raleigh.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi174.photobucket.com%2Falbums%2Fw102%2Farchitect77%2Fhillsborough1.jpg&hash=18bf08a62be6268b058ec615f231c04033b44aa0)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Ian on October 06, 2011, 06:41:17 PM
Quote from: architect77 on October 06, 2011, 05:20:30 PM
I like unpainted Cali-style best, seen here at NC State's Hillsborough St. in Raleigh.
<image>

I agree, I wish we had more of them here in the northeast. The one in the photo looks sharp!
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: realjd on October 06, 2011, 11:39:35 PM
Quote from: architect77 on October 06, 2011, 05:20:30 PM
I like unpainted Cali-style best, seen here at NC State's Hillsborough St. in Raleigh.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi174.photobucket.com%2Falbums%2Fw102%2Farchitect77%2Fhillsborough1.jpg&hash=18bf08a62be6268b058ec615f231c04033b44aa0)

Is that half span wire, half mast arm? Is it because of the construction?
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: pianocello on October 07, 2011, 05:21:58 PM
Doesn't look like the mast arms are operational yet.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: architect77 on October 08, 2011, 02:07:41 PM
Hillsborough St., the main drag of NC State, has long been an eyesore. They just completed reducing 4 lanes to 2 and added a median for pedestrians. They converted a couple of intersections to roundabouts. These mast arms are long, and most hold signals for both directions (for crosswalks). This picture does show an intersection with 2 short ones almost "kissing" over the road though...
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi174.photobucket.com%2Falbums%2Fw102%2Farchitect77%2Fhillsborough.png&hash=f6a79149d6e53df44222d58d9cf79280f25daa10)
Nearby Cary, NC which uber-regulates everything from business signs to the size of people's holiday wreaths, uses cali-style mast arm citywide, though their mounting of the signals is inconsistent and not as elegant as California's....
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi174.photobucket.com%2Falbums%2Fw102%2Farchitect77%2Fcary-1.png&hash=aaf27f4c912371dd777b52441bfc02828c2d4377)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Crazy Volvo Guy on October 08, 2011, 05:54:53 PM
Inconsistency is something I hate more than anything.

In any event, I love CA/AZ/UT style mast arms.  I hate span wires and I'm not terribly fond of straight arms, though they are a lot better than span wires.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Brandon on October 08, 2011, 07:54:48 PM
As much as mast arms may look good (and I do like the older Illinois trusses), I like the two boxes from a single span wire.  Simple, elegant, timeless, IMHO.

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi837.photobucket.com%2Falbums%2Fzz298%2Fmidamcrossrds%2Fbus28-2.jpg&hash=8cc43b1c2692fcf81dd5ba5fa66a2a07f7d050b3)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: CL on October 08, 2011, 08:53:59 PM
Looks like North Carolina is basically using the exact same style of installation as Utah is (with thicker mast arms than California).

Utah - well, UDOT - will only paint its mast arms if the municipality specifies/pays for it. In that case, it'll be painted black. Otherwise, it's left unpainted. Salt Lake City paints all its new installations black. Very rarely one will see other colors, including this dark green assembly north of Park City on SR-224:

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi1087.photobucket.com%2Falbums%2Fj474%2FCountyLemonade%2F000007264233.jpg%3Ft%3D&hash=0243210855b961e60bd5f68b61e8a08778c3b701)
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: 2Co5_14 on October 18, 2011, 09:15:50 PM
Berkeley, CA paints everything brown (including signal heads.)  Until about 20-25 years ago, all the mast arms were this short.  Then they started using longer ones with either 1 or 2 signal heads (more like the typical California ones.)
http://www.panoramio.com/photo/9703599?source=wapi&referrer=kh.google.com (http://www.panoramio.com/photo/9703599?source=wapi&referrer=kh.google.com)

Oakland, CA used to paint the lower 1/3 of the pole and the mast arms pale yellow, and the upper part of the light pole and luminaire arm green (think A's baseball colors).  Now they do everything green (not as interesting, but more practical.)
http://www.panoramio.com/photo/47203277?source=wapi&referrer=kh.google.com (http://www.panoramio.com/photo/47203277?source=wapi&referrer=kh.google.com)

Just like the rest of CA, they always use supplemental near-side (and usually far-side) signals along with the mast arm mounted ones.

As a 4 year old roadgeek riding in the car, I could always tell when we were crossing the city limits from Albany to Berkeley and from Berkeley to Oakland by the different colors! :rolleyes:
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: realjd on October 19, 2011, 07:28:40 AM
San Marcos does the all-brown thing in places also:
http://maps.google.com/maps?q=San+Marcos,+CA&hl=en&ll=33.133174,-117.19387&spn=0.029037,0.038581&sll=37.0625,-95.677068&sspn=55.279921,79.013672&vpsrc=6&hnear=San+Marcos,+San+Diego,+California&t=m&z=15&layer=c&cbll=33.133174,-117.19387&panoid=tuUWwCIh6dPps-5hAHATsg&cbp=12,69.98,,0,-3
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: roadman65 on October 23, 2011, 07:08:09 PM
The US 192 Corridor in Kissimmee, FL uses purple for the mast arm coloring.  That, I believe, is to be consistent with Disney using purple on their resort property's guide signs.  Remember, Disney is why most people come to Central Florida to visit.  Also, so are the area street lights and sidewalk lights using that color.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: SignBridge on November 09, 2011, 09:10:23 PM
2Co5-14, those Calif. near-side supplementals you mentioned are not universal out there, though the far-side ones are. Some interesections have them, some don't. There doesn't seem to be much consistency to it. Though El Camino Real between San Fran. and San Jose seems to have them at most intersections. I like them too, though I have to admit, they don't really serve much purpose on a straight road. Rarely used in New York unfortunately except at some curved approaches.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: PAHighways on November 15, 2011, 06:25:54 PM
Phoenixville, PA (http://maps.google.com/maps?q=phoenixville,+pa&hl=en&ll=40.133675,-75.518732&spn=0.008137,0.013797&sll=37.0625,-95.677068&sspn=35.90509,56.513672&vpsrc=6&hnear=Phoenixville,+Chester,+Pennsylvania&t=m&z=16&layer=c&cbll=40.133687,-75.518594&panoid=Hx2idVykOM7EOM3xetU56g&cbp=12,39.05,,0,-19.6) is using bright blue poles for their new signal installations.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Zmapper on November 15, 2011, 06:49:04 PM
Fort Collins has a hodgepodge of signal colors. Most of them are silver or unpainted. There are a few dark green and a few brown signals.

One thing that I do like are the median mounted signals along South College (US 287). I wish new installations along College were mounted this way. In a way, it helps to differentiate College from the other streets.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: US71 on November 15, 2011, 07:06:42 PM

Clarinda, IA  (http://g.co/maps/4gchr/)

Thought I had a photo in my files, but I don't. :(
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: Indyroads on December 18, 2011, 07:24:38 PM
Quote from: myosh_tino on October 04, 2011, 02:36:38 PM

I also ran across this unusual design in Sacramento.  Not sure if they install new signals with this type of mast arm but IIRC, there are a number of these scattered around the Sacramento metro area...
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.markyville.com%2Faaroads%2FSacramento.jpg&hash=7b59aa86d98026d03ea4c02034f0aa88ebc94869)

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.markyville.com%2Faaroads%2FSacramento2.jpg&hash=f56f0aeae8c4dc7d37962665550e22746efeece0)

I particularly like this style of traffic signal. The newer version of the "sacramento county style" traffic signal does not dip as much at the left turn signal as the older examples here. The Ethan and El Camino Avenue signal is very old indeed. The city of Citrus heights has painted these signals as part of their branding theme including the replacements of streeet signs several years ago. they look really spiffy. Typically the larger intersections with multiple turn lanes do not use this style favoring the more normal caltrans style of signal that is used today. SACDOT however has a unique way of signing its double left turns using a separate left arrow for each lane typically placed on either side of the left turn signal.
Title: Re: Color of Signal Mast Arms (split from Signage/Gantries Off Kilter)
Post by: The High Plains Traveler on December 18, 2011, 07:51:44 PM
In the nearly 10 years I've lived in Colorado, I have always thought there were different signal designs on state highways around the state. I finally realized the basic signal design was consistent: monotube with the mounting for the mast arm evolving on older to newer installations, from a simple four-bolt mount to the present design which uses U-bolts and a much larger flange plate to secure the longer, heavier mast arms. What threw me was the different color schemes around the state. Around here, older signals have unpainted masts and mast arms with black signal faces and backplates. The more recent installations (5-7 years) have black structural components as well. As you go into the Denver area, the signals tend to still be unpainted, but the signal faces are yellow with black backplates.

My guess is that this is a CDOT district decision because it appears districts have freedom to vary design. For instance, CDOT District 2 (Colorado Springs, Pueblo and the rest of SE Colorado) is moving wholeheartedly into flashing yellow arrow installations on new and even existing signals. I have not seen FYA nearly as much in the rest of the state.