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National Boards => General Highway Talk => Topic started by: stevenliu96 on August 29, 2020, 12:48:49 PM

Title: Most Traffic Lights on a Standard Mast Arm
Post by: stevenliu96 on August 29, 2020, 12:48:49 PM
The most I've seen is seven.

Mills Civic Parkway & Jordan Creek Parkway in West Des Moines, IA
https://www.instagram.com/p/CD_a9LGlsr6/?utm_source=ig_web_copy_link (https://www.instagram.com/p/CD_a9LGlsr6/?utm_source=ig_web_copy_link)
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: ozarkman417 on August 29, 2020, 12:53:51 PM
Six on the front, two in back (https://www.google.pl/maps/@37.6104306,-77.3528996,3a,60y,56.66h,92.76t/data=!3m6!1e1!3m4!1svSW2yB5yzrpB6U_RfHVSEA!2e0!7i13312!8i6656)
Eight total.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: STLmapboy on August 29, 2020, 09:05:03 PM
There are plenty of sevens: here are Las Vegas (https://www.google.pl/maps/@36.1081506,-115.1728513,3a,45y,-2.78h,93.21t/data=!3m6!1e1!3m4!1stimZyuGltpXgnR3shFRmWw!2e0!7i16384!8i8192/) and Atlanta (https://www.google.pl/maps/@33.8810453,-84.4641836,3a,57.1y,194.14h,91.68t/data=!3m6!1e1!3m4!1szoDbDPQLnCq22VpptCa1sg!2e0!7i16384!8i8192/) examples. Eights are a bit harder.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: Ned Weasel on August 29, 2020, 11:16:09 PM
Sheesh, poor Olathe, Kansas only having six: https://goo.gl/maps/1xedpbqhaXe9FCvn6 .  Like, hello, are we even trying over here?
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: stevenliu96 on August 30, 2020, 10:56:53 AM
Quote from: STLmapboy on August 29, 2020, 09:05:03 PM
There are plenty of sevens: here are Las Vegas (https://www.google.pl/maps/@36.1081506,-115.1728513,3a,45y,-2.78h,93.21t/data=!3m6!1e1!3m4!1stimZyuGltpXgnR3shFRmWw!2e0!7i16384!8i8192/) and Atlanta (https://www.google.pl/maps/@33.8810453,-84.4641836,3a,57.1y,194.14h,91.68t/data=!3m6!1e1!3m4!1szoDbDPQLnCq22VpptCa1sg!2e0!7i16384!8i8192/) examples. Eights are a bit harder.

I'm originally from California where even four traffic lights on a mast arm is rare.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: EpicRoadways on August 30, 2020, 06:27:58 PM
Nine on this  (https://goo.gl/maps/QPbenKr9eUjyJqE19)massive arm in Buffalo, MN.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: tradephoric on August 31, 2020, 02:11:02 PM
This SPUI outside of Columbus has 13 signal heads along the mast arm: 
https://www.google.com/maps/@40.0817261,-82.8956612,3a,75y,206.08h,98t/data=!3m6!1e1!3m4!1s1V6tDzBn2MR-u5W87_REBw!2e0!7i16384!8i8192
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: kphoger on August 31, 2020, 02:33:02 PM
Quote from: tradephoric on August 31, 2020, 02:11:02 PM
This SPUI outside of Columbus has 13 signal heads along the mast arm: 
https://www.google.com/maps/@40.0817261,-82.8956612,3a,75y,206.08h,98t/data=!3m6!1e1!3m4!1s1V6tDzBn2MR-u5W87_REBw!2e0!7i16384!8i8192

The question, though, is this:  Is that a "standard mast arm"?
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: stevenliu96 on August 31, 2020, 02:53:44 PM
Quote from: kphoger on August 31, 2020, 02:33:02 PM
Quote from: tradephoric on August 31, 2020, 02:11:02 PM
This SPUI outside of Columbus has 13 signal heads along the mast arm: 
https://www.google.com/maps/@40.0817261,-82.8956612,3a,75y,206.08h,98t/data=!3m6!1e1!3m4!1s1V6tDzBn2MR-u5W87_REBw!2e0!7i16384!8i8192

The question, though, is this:  Is that a "standard mast arm"?

The original idea I had in mind was the most traffic signals facing the same direction on a standard (non-diagonal across the intersection type) mast arm.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: kphoger on August 31, 2020, 02:59:03 PM
In that case, I don't think any of the suggestions so far has topped seven.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: stevenliu96 on August 31, 2020, 03:10:16 PM
Quote from: kphoger on August 31, 2020, 02:59:03 PM
In that case, I don't think any of the suggestions so far has topped seven.

Yeah, well seven is the most I've seen. The Las Vegas ones were also seven.
https://www.google.com/maps/@36.1082687,-115.1728559,3a,65.8y,350.4h,103.58t/data=!3m7!1e1!3m5!1sYg0h3L0oafCkqCV3wgCOcQ!2e0!5s20180801T000000!7i16384!8i8192 (https://www.google.com/maps/@36.1082687,-115.1728559,3a,65.8y,350.4h,103.58t/data=!3m7!1e1!3m5!1sYg0h3L0oafCkqCV3wgCOcQ!2e0!5s20180801T000000!7i16384!8i8192)

https://www.google.com/maps/@36.1087763,-115.1728459,3a,39.2y,4.61h,98.37t/data=!3m7!1e1!3m5!1srD-6uq-f2r4kchZqLrr8pQ!2e0!5s20200301T000000!7i16384!8i8192 (https://www.google.com/maps/@36.1087763,-115.1728459,3a,39.2y,4.61h,98.37t/data=!3m7!1e1!3m5!1srD-6uq-f2r4kchZqLrr8pQ!2e0!5s20200301T000000!7i16384!8i8192)

However, if this thread is going the diagonal across the intersection direction, there's a 18 traffic light set up at this intersection in Dubuque, IA.
https://www.google.com/maps/@42.4920391,-90.6656137,3a,75y,125.39h,90.6t/data=!3m6!1e1!3m4!1sjp41_3toR6SSIvg5Svcu2g!2e0!7i16384!8i8192 (https://www.google.com/maps/@42.4920391,-90.6656137,3a,75y,125.39h,90.6t/data=!3m6!1e1!3m4!1sjp41_3toR6SSIvg5Svcu2g!2e0!7i16384!8i8192)
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: STLmapboy on August 31, 2020, 04:39:27 PM
Quote from: stevenliu96 on August 31, 2020, 03:10:16 PM
Quote from: kphoger on August 31, 2020, 02:59:03 PM
In that case, I don't think any of the suggestions so far has topped seven.

Yeah, well seven is the most I've seen. The Las Vegas ones were also seven.
https://www.google.com/maps/@36.1082687,-115.1728559,3a,65.8y,350.4h,103.58t/data=!3m7!1e1!3m5!1sYg0h3L0oafCkqCV3wgCOcQ!2e0!5s20180801T000000!7i16384!8i8192 (https://www.google.com/maps/@36.1082687,-115.1728559,3a,65.8y,350.4h,103.58t/data=!3m7!1e1!3m5!1sYg0h3L0oafCkqCV3wgCOcQ!2e0!5s20180801T000000!7i16384!8i8192)

https://www.google.com/maps/@36.1087763,-115.1728459,3a,39.2y,4.61h,98.37t/data=!3m7!1e1!3m5!1srD-6uq-f2r4kchZqLrr8pQ!2e0!5s20200301T000000!7i16384!8i8192 (https://www.google.com/maps/@36.1087763,-115.1728459,3a,39.2y,4.61h,98.37t/data=!3m7!1e1!3m5!1srD-6uq-f2r4kchZqLrr8pQ!2e0!5s20200301T000000!7i16384!8i8192)

However, if this thread is going the diagonal across the intersection direction, there's a 18 traffic light set up at this intersection in Dubuque, IA.
https://www.google.com/maps/@42.4920391,-90.6656137,3a,75y,125.39h,90.6t/data=!3m6!1e1!3m4!1sjp41_3toR6SSIvg5Svcu2g!2e0!7i16384!8i8192 (https://www.google.com/maps/@42.4920391,-90.6656137,3a,75y,125.39h,90.6t/data=!3m6!1e1!3m4!1sjp41_3toR6SSIvg5Svcu2g!2e0!7i16384!8i8192)

I like the extended visors on the Vegas (https://www.google.com/maps/@36.1088943,-115.1730142,3a,39.5y,44.77h,97.6t/data=!3m6!1e1!3m4!1sO2h1RvP7_-rWpqxU242SNQ!2e0!7i16384!8i8192/) ones. What's the name for those again?
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: MCRoads on September 01, 2020, 05:15:05 PM
Well, if masts supported at both ends are fair game, this one (https://goo.gl/maps/FHW3R7tJ4Zys6XZc8) in Tampa has 19!

Florida is king in this department, they have many large diagonal intersections with setups like this.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: paulthemapguy on September 01, 2020, 07:32:53 PM
Found an 8 down the street from the 7 posted earlier by Atlanta:

https://goo.gl/maps/Mm5c6wsLxJkaRNiZA
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: webny99 on September 01, 2020, 10:10:35 PM
Would this (https://www.google.com/maps/@44.732055,-93.2174971,3a,90y,338.17h,96.08t/data=!3m6!1e1!3m4!1sZxyupxvqtanR10vHZ1os4A!2e0!7i16384!8i8192!5m1!1e1?hl=en) count as seven?
If so, then there's plenty of similar examples along this entire corridor.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: kphoger on September 02, 2020, 09:06:49 AM
Guys, please see the bolded portion below.

We're still at seven.

Quote from: stevenliu96 on August 31, 2020, 02:53:44 PM
The original idea I had in mind was the most traffic signals facing the same direction on a standard (non-diagonal across the intersection type) mast arm.

Of course, we've started talking about other things too, specifically corner-to-corner installations.  But, if you're trying to find a winner for a "standard mast arm", then you need to make sure they're all facing the same direction of traffic.
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: stevenliu96 on September 02, 2020, 09:46:07 AM
Quote from: STLmapboy on August 31, 2020, 04:39:27 PM
Quote from: stevenliu96 on August 31, 2020, 03:10:16 PM
Quote from: kphoger on August 31, 2020, 02:59:03 PM
In that case, I don't think any of the suggestions so far has topped seven.

Yeah, well seven is the most I've seen. The Las Vegas ones were also seven.
https://www.google.com/maps/@36.1082687,-115.1728559,3a,65.8y,350.4h,103.58t/data=!3m7!1e1!3m5!1sYg0h3L0oafCkqCV3wgCOcQ!2e0!5s20180801T000000!7i16384!8i8192 (https://www.google.com/maps/@36.1082687,-115.1728559,3a,65.8y,350.4h,103.58t/data=!3m7!1e1!3m5!1sYg0h3L0oafCkqCV3wgCOcQ!2e0!5s20180801T000000!7i16384!8i8192)

https://www.google.com/maps/@36.1087763,-115.1728459,3a,39.2y,4.61h,98.37t/data=!3m7!1e1!3m5!1srD-6uq-f2r4kchZqLrr8pQ!2e0!5s20200301T000000!7i16384!8i8192 (https://www.google.com/maps/@36.1087763,-115.1728459,3a,39.2y,4.61h,98.37t/data=!3m7!1e1!3m5!1srD-6uq-f2r4kchZqLrr8pQ!2e0!5s20200301T000000!7i16384!8i8192)

However, if this thread is going the diagonal across the intersection direction, there's a 18 traffic light set up at this intersection in Dubuque, IA.
https://www.google.com/maps/@42.4920391,-90.6656137,3a,75y,125.39h,90.6t/data=!3m6!1e1!3m4!1sjp41_3toR6SSIvg5Svcu2g!2e0!7i16384!8i8192 (https://www.google.com/maps/@42.4920391,-90.6656137,3a,75y,125.39h,90.6t/data=!3m6!1e1!3m4!1sjp41_3toR6SSIvg5Svcu2g!2e0!7i16384!8i8192)

I like the extended visors on the Vegas (https://www.google.com/maps/@36.1088943,-115.1730142,3a,39.5y,44.77h,97.6t/data=!3m6!1e1!3m4!1sO2h1RvP7_-rWpqxU242SNQ!2e0!7i16384!8i8192/) ones. What's the name for those again?

On McCain's website it just says "45° Angle".
https://mccain-inc.com/images/mccain-files/products/cut-sheets/Signals/Signal_Visors.pdf (https://mccain-inc.com/images/mccain-files/products/cut-sheets/Signals/Signal_Visors.pdf)
Title: Re: Most Traffic Lights on a Standard Mast Arm
Post by: jakeroot on September 10, 2020, 04:54:00 AM
Very difficult to answer for WA.

In order to really have a lot of traffic lights, it helps to have at least a triple left turn. There's only three triple left turns that I know of, and two of those use two overhead and a third supplemental signal not on the mast arm (either far left of intersection or near-side on the opposing direction's mast arm); the third is span wire. Of those approaches, only one has three through lanes. At any rate, we're at five signals (two left, three through).

There's a few approaches with four through lanes, but all have only a single left turn. Again: five signals.

There are wide California-esque roads in cities like Spokane or Federal Way, but both employ supplemental signals instead of signal-per-lane strategies, so none have any installations with a bunch of overhead signals.

The other problem is that double right turns are almost always via slip lanes, so those extra signals are always a separate mast arm or pole.

So yeah, I'm putting Washington down as "five". Every approach with more than five lanes employs, at the very least, some supplemental signals or "through minus one" strategies.
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