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National Boards => General Highway Talk => Traffic Control => Topic started by: Revive 755 on October 03, 2015, 11:08:36 PM

Title: Mast arm and span wire at same intersection for permanent signals
Post by: Revive 755 on October 03, 2015, 11:08:36 PM
Per Streetview, (https://www.google.com/maps/@39.694709,-86.1868681,3a,77.6y,124.31h,86.76t/data=!3m6!1e1!3m4!1sDEvlnikSexFgPiP1tVn7wA!2e0!7i13312!8i6656?hl=en) the IN 37 intersection with the ramps for EB I-74/I-465 uses span wire for all but the signals heads for the EB right turn lanes.  The EB right turn lanes are mast arm mounted.  I suspect this is extremely rare - are there many other locations somewhat like this, excluding locations where span wire signals are used for one or more legs during a construction project?

(Edited to fix spelling error)
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: UCFKnights on October 03, 2015, 11:36:18 PM
I've seen this quite a bit on angled turning lanes where its difficult to run the span wire in one direction.
This one comes to mind (although it was just upgraded to all mast arms)
https://www.google.com/maps/@29.6352114,-82.3543065,3a,75y,59.18h,95.19t/data=!3m7!1e1!3m5!1s_MvdeJnB3poLhR36Qoj1MA!2e0!5s20110301T000000!7i13312!8i6656!6m1!1e1?hl=en


Orlando also has a lot of intersections with both, often for no reason at all:
https://www.google.com/maps/@28.4211252,-81.4046998,3a,75y,341.24h,87.38t/data=!3m7!1e1!3m5!1sdeH6NooEUgaKuvzAIBBGkg!2e0!5s20130701T000000!7i13312!8i6656?hl=en
https://www.google.com/maps/@28.5152199,-81.4203384,3a,75y,358.25h,91.75t/data=!3m7!1e1!3m5!1sSvEThmVhNpxLY8pE7d5iQA!2e0!5s20150801T000000!7i13312!8i6656
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: PurdueBill on October 04, 2015, 12:57:25 AM
This setup is basically the same as when it first went in back in the late 80s (https://www.google.com/maps/@42.550579,-70.955897,3a,66.8y,118.55h,96.38t/data=!3m4!1e1!3m2!1syuOT6wB0u2sNrMjpq-fKNQ!2e0) when 114 was widened to include a center turn lane, although the original brown large poles for the span wire are gone.  The mast arm and its signals for the side street do date to the late 80s still.

Down the road and debatable for this thread is this setup which is at an offset intersection; (https://www.google.com/maps/@42.537641,-70.935071,3a,92.4y,313.35h,81.39t/data=!3m4!1e1!3m2!1sUUYyTTqN_rqsb3nxdtsn9g!2e0) one could argue that the signals are at separate intersections, but they all are coordinated and were also installed in the same 114 project (brown masts and poles were used throughout for overhead signals).

Further east on 114 is another example (https://www.google.com/maps/@42.534574,-70.92872,3a,92.4y,2.91h,80.51t/data=!3m4!1e1!3m2!1sShlNh0ALcdi2Z3vz6HAfbw!2e0) which has what I bet would be very common  like what UCFKnights mentioned--right turn lanes with their own mast arm signals while most are on the span wire.

Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: tdindy88 on October 04, 2015, 01:41:03 AM
Six miles east of the original example posted here there's the interchange between I-465 and Emerson Avenue. It's a SPUI interchange so there's only one span-wire set up for all directions, but there is a separate mast arm light for traffic coming off of eastbound 465 onto southbound Emerson.

https://www.google.com/maps/@39.7028524,-86.0826512,3a,75y,333.95h,82.37t/data=!3m6!1e1!3m4!1s5z7F3_N-Cd0LVYg_bqwc0A!2e0!7i13312!8i6656?hl=en
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: freebrickproductions on October 04, 2015, 12:55:37 PM
We've got a few here in Huntsville, AL. These are the three that come to mind for me:
Drake Avenue & L&N Drive (https://www.google.com/maps/@34.7051688,-86.584664,3a,75y,349.23h,95.52t/data=!3m6!1e1!3m4!1set2jMpjabw62f4ztidVMhg!2e0!7i13312!8i6656?hl=en)
Andrew Jackson Way, Pratt Avenue, and Holmes Avenue (https://www.google.com/maps/@34.7388905,-86.5767925,3a,75y,169.06h,85.99t/data=!3m7!1e1!3m5!1s4dqIDQnAB78K-cqC-UgGPw!2e0!6s%2F%2Fgeo1.ggpht.com%2Fcbk%3Fpanoid%3D4dqIDQnAB78K-cqC-UgGPw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D344.06027%26pitch%3D0!7i13312!8i6656?hl=en)
Pratt Avenue and Russell Street (https://www.google.com/maps/@34.7387987,-86.5754077,3a,75y,258.24h,91.24t/data=!3m7!1e1!3m5!1shqf1Ww-pvLnwSkjx_zrcuQ!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3Dhqf1Ww-pvLnwSkjx_zrcuQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D67.43605%26pitch%3D0!7i13312!8i6656?hl=en)
Weatherly Road and Bailey Cove Road (https://www.google.com/maps/@34.6463796,-86.5399685,3a,75y,173.36h,86.19t/data=!3m6!1e1!3m4!1sh27HiLUQ_h3J0nc1c-aXXg!2e0!7i13312!8i6656?hl=en) - though the signals were all on mast-arms when street view went through, the one on the right has since been replaced with this span-wire:
(https://farm1.staticflickr.com/592/21917198086_c4b5e35fe9.jpg) (https://flic.kr/p/zoKnpC)Siemens and Winkomatic Traffic Lights (https://flic.kr/p/zoKnpC) by freebrickproductions (https://www.flickr.com/photos/96431468@N06/), on Flickr

And then there's this set-up (https://www.google.com/maps/@34.1730914,-86.8479694,3a,75y,185.71h,85.36t/data=!3m7!1e1!3m5!1sJ__AGqqawxJlaZ5fP--ccA!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DJ__AGqqawxJlaZ5fP--ccA%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D140.54544%26pitch%3D0!7i13312!8i6656?hl=en) in Cullman, AL.
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: The High Plains Traveler on October 04, 2015, 01:47:44 PM
Here's County Line Road at Chester St., Lone Tree and Centennial CO. (South metro Denver). I don't know if having different counties involved is the reason. And, in zooming in further from this picture, I noticed a wire across the side of the intersection that has the mast-arm signal.
https://www.google.com/maps/place/Centennial,+CO/@39.5658741,-104.8798135,3a,75y,320.63h,87.2t/data=!3m7!1e1!3m5!1s5RDmJOntF2hMw4_M_FE5WQ!2e0!6s%2F%2Fgeo2.ggpht.com%2Fcbk%3Fpanoid%3D5RDmJOntF2hMw4_M_FE5WQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D204.83563%26pitch%3D0!7i13312!8i6656!4m2!3m1!1s0x876c85c4f20a97c5:0x99d31d8142c6d7a7!6m1!1e1
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Mohkfry on October 04, 2015, 04:10:00 PM
The only two I can think of.
You'll have to pan around both intersections to see what they look like completely.

https://www.google.com/maps/@41.6987594,-87.5203558,3a,30y,201.07h,88.73t/data=!3m6!1e1!3m4!1skvh_Q2v8ky9aRUX8Kjgqyg!2e0!7i13312!8i6656!6m1!1e1

The ones on the mast arm in this next link are McCain PV signals.

https://www.google.com/maps/@38.2353102,-86.127591,3a,75y,259.99h,77.63t/data=!3m6!1e1!3m4!1sUtTAHl-cjG0AYTVqgljbyg!2e0!7i13312!8i6656
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: roadman65 on October 04, 2015, 04:33:16 PM
Florida has plenty of them.    New Jersey used to have them at some places around the North Jersey Metro Area, before NJ decided to go exclusively mast arm and bright yellow.
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: PurdueBill on October 05, 2015, 12:44:10 AM
Quote from: Mohkfry on October 04, 2015, 04:10:00 PM
The only two I can think of.
You'll have to pan around both intersections to see what they look like completely.

https://www.google.com/maps/@41.6987594,-87.5203558,3a,30y,201.07h,88.73t/data=!3m6!1e1!3m4!1skvh_Q2v8ky9aRUX8Kjgqyg!2e0!7i13312!8i6656!6m1!1e1

The ones on the mast arm in this next link are McCain PV signals.

https://www.google.com/maps/@38.2353102,-86.127591,3a,75y,259.99h,77.63t/data=!3m6!1e1!3m4!1sUtTAHl-cjG0AYTVqgljbyg!2e0!7i13312!8i6656

Interesting that INDOT used a mast arm in parallel with the span wires that aren't holding anything; INDOT has done PV signals on span wires in places.  Must be some reason particular to the location or those signal heads.  (It could be that 3M PV signals, which is what I think I recall on other INDOT span wires, are more robust to span wire placement.)

Adding....
Indeed I had a moment of Duh when thinking about the topic before....I knew there was one I was forgetting.  And what do you know, it is at an intersection I traveled through nearly daily for over 4 years.

The 3M PV heads thing finally made this one kick in. (https://www.google.com/maps/place/Lafayette,+IN/@40.417335,-86.879126,3a,66.8y,107.13h,95.81t/data=!3m4!1e1!3m2!1sMhClKKz6-Ae_koqJ5RRfUQ!2e0!4m2!3m1!1s0x8813001a192aeaad:0xa541eddbe84f1ef5)  How could I forget it?  Mast arm and span wire, mixture of PV and regular heads on the span wire....this one has it all.  How could I forget it before?
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Mohkfry on October 05, 2015, 08:20:05 AM
Quote from: PurdueBill on October 05, 2015, 12:44:10 AM
Quote from: Mohkfry on October 04, 2015, 04:10:00 PM
The only two I can think of.
You'll have to pan around both intersections to see what they look like completely.

https://www.google.com/maps/@41.6987594,-87.5203558,3a,30y,201.07h,88.73t/data=!3m6!1e1!3m4!1skvh_Q2v8ky9aRUX8Kjgqyg!2e0!7i13312!8i6656!6m1!1e1

The ones on the mast arm in this next link are McCain PV signals.

https://www.google.com/maps/@38.2353102,-86.127591,3a,75y,259.99h,77.63t/data=!3m6!1e1!3m4!1sUtTAHl-cjG0AYTVqgljbyg!2e0!7i13312!8i6656

Interesting that INDOT used a mast arm in parallel with the span wires that aren't holding anything; INDOT has done PV signals on span wires in places.  Must be some reason particular to the location or those signal heads.  (It could be that 3M PV signals, which is what I think I recall on other INDOT span wires, are more robust to span wire placement.)


Remember that the link I posted is a different district than what I live in but there at least 5 span wire PV installs along US 12 in Gary. So i couldn't really tell you why they were installed that way. The first time I saw it, i thought it was possibly for wind resistance. If PV signals are installed on mast arms in the Northwest district, it's usually because the whole install is a mast arm install.
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Buffaboy on October 05, 2015, 03:44:00 PM
Walden Avenue and Walden Galleria, Cheektowaga, New York (https://www.google.com/maps/place/Walden+Galleria/@42.9092304,-78.7620138,3a,75y,225.51h,80.42t/data=!3m6!1e1!3m4!1sIhypuNPUcEo8lJ7nk8wqKA!2e0!7i13312!8i6656!4m2!3m1!1s0x89d30cbda92d9509:0x792c16721a836bb6!6m1!1e1)
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Ian on October 05, 2015, 10:23:40 PM
Not a mast-arm, but here's an intersection with a span-wire/truss-arm combo in Lisbon Falls, ME

https://goo.gl/maps/ocCDPrxB52N2
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: steviep24 on October 06, 2015, 08:43:17 PM
NY 252 at Saginaw Dr. in Henrietta, NY

https://www.google.com/maps/@43.0868193,-77.5928075,3a,75y,19h,90t/data=!3m6!1e1!3m4!1sVEG8-mfkic2H7_K9EHBDxg!2e0!7i13312!8i6656?hl=en
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Mohkfry on October 13, 2015, 10:30:12 AM
Here's another one from INDOT at the US 12/Arcelor Mittal Entrance road in Burns Harbor, IN.
https://www.google.com/maps/@41.6305234,-87.1026608,3a,75y,244.1h,86.03t/data=!3m6!1e1!3m4!1sqTULDqXwWR93Qyw7Qj75yA!2e0!7i13312!8i6656!6m1!1e1

Edit: Here's another out if Gary, IN. This was an all mast arm install prior to early 2013. The 2008 street view shows the all mast arm install.

2013:
https://www.google.com/maps/place/Gary,+IN/@41.603175,-87.3297653,3a,37.5y,342.1h,89.02t/data=!3m7!1e1!3m5!1s5p-IC2we0pH1oCgYPL1DnQ!2e0!6s%2F%2Fgeo2.ggpht.com%2Fcbk%3Fpanoid%3D5p-IC2we0pH1oCgYPL1DnQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D112.7611%26pitch%3D0!7i13312!8i6656!4m2!3m1!1s0x8811c26949eba4df:0x3ec3739841d01645!6m1!1e1
2008:
https://www.google.com/maps/@41.6032869,-87.3297508,3a,75y,310.86h,94.96t/data=!3m6!1e1!3m4!1su4xE278Kk200rkAWNA1Rcw!2e0!7i3328!8i1664!6m1!1e1
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Michael on October 15, 2015, 10:04:23 PM
There's a few of these in the CNY area.  One is on Lake St at US 20/NY 5 in Geneva (https://www.google.com/maps/@42.86999,-76.979601,3a,36.8y,110.42h,90.25t/data=!3m4!1e1!3m2!1sj8YjyFBWm6QxWLxYwN7chw!2e0), and it's pretty obvious that it's to keep cars from stopping on the railroad tracks.  Another one is at the east end of Erie Blvd in DeWitt (https://www.google.com/maps/@43.035137,-76.065662,3a,45.3y,178.07h,91.99t/data=!3m4!1e1!3m2!1s8xif2NlsEH90e--6Jii6lQ!2e0).  I don't know why there's a separate mast arm since the span wire is closer than the maximum distance in the MUTCD.  Another one is on NY 5 in Oneida (https://www.google.com/maps/@43.078663,-75.653571,3a,36.8y,96.69h,89.29t/data=!3m4!1e1!3m2!1s_adYx6bPr1LBERNJ4kfI4g!2e0).  I mentioned it in another post (https://www.aaroads.com/forum/index.php?topic=5944.msg2100542#msg2100542), and I'm assuming it's so cars stop before going down the hill so they can be seen.  Lastly, there used to be one here in Auburn at the intersection of NY 326 and US 20/NY 5 (https://www.google.com/maps/@42.928953,-76.595284,3a,45.3y,346.17h,90.8t/data=!3m4!1e1!3m2!1smg3QJE1m6vosMFRi6rlUyw!2e0).  The span wire crossed US 20/NY 5 with a post in the median of NY 326, and the mast arm for NY 326 was in the median of US 20/NY 5.  The picture below is from Doug Kerr's Flickr account (https://www.flickr.com/photos/dougtone/4295534844/in/album-72157623136676069), and according to the NY Ends page for NY 326 (http://gribblenation.net/nyends/326.html), it was taken on December 1st, 2001.  Note the mast arm to the left of the left red signal head.
(https://farm3.staticflickr.com/2711/4295534844_14c3a854df_o.jpg)

EDIT: I forgot to mention NY 290/NY 635 in East Syracuse (https://www.google.com/maps/@43.069178,-76.090739,3a,45.3y,14.26h,92.15t/data=!3m4!1e1!3m2!1soqR3vew2St1CMhcVNAXEZA!2e0).
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: kj3400 on October 15, 2015, 10:08:46 PM
Then there's this mess in Baltimore at Martin Luther King and Washington Blvds:
https://www.google.com/maps/@39.2835151,-76.626451,3a,75y,116.51h,86.58t/data=!3m6!1e1!3m4!1sbCn-BXmoDql89viV3sT7MQ!2e0!7i13312!8i6656?hl=en
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: jakeroot on October 15, 2015, 11:20:37 PM
Quote from: kj3400 on October 15, 2015, 10:08:46 PM
Then there's this mess in Baltimore at Martin Luther King and Washington Blvds:
https://www.google.com/maps/@39.2835151,-76.626451,3a,75y,116.51h,86.58t/data=!3m6!1e1!3m4!1sbCn-BXmoDql89viV3sT7MQ!2e0!7i13312!8i6656?hl=en

Please, please let that be temporary.




One mixed intersection near me: River Rd at Pioneer (https://goo.gl/oav0sZ) -- the slip lane was redesigned about 10 years ago and the crossing was moved upstream. River Rd didn't change, but the movement to Pioneer was modified, hence two different signals.
Title: Re: Mast arm and span wire at same intersection for permanent signals
Post by: Big John on October 15, 2015, 11:48:55 PM
Quote from: jakeroot on October 15, 2015, 11:20:37 PM
Quote from: kj3400 on October 15, 2015, 10:08:46 PM
Then there's this mess in Baltimore at Martin Luther King and Washington Blvds:
https://www.google.com/maps/@39.2835151,-76.626451,3a,75y,116.51h,86.58t/data=!3m6!1e1!3m4!1sbCn-BXmoDql89viV3sT7MQ!2e0!7i13312!8i6656?hl=en

Please, please let that be temporary.

Hopefully so as it looks like the pole in the median had mast arms, lost them in an accident so that was the makeshift measure.

edit:  Not so as it has been the same way since at least 2007.