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by **weatherdan882002** on Fri Apr 27, 2012 9:37 pm

Getting back to the FYA idea, I know that the downfall with bi-modals is color blindness, but when you thing about it, it's a non issue w/ FYAs. If it's green, it'll always be steady, and if it's a flashing yellow, it'll always be flashing, as the yellow arrow to indicate the light is turning red has it's own section above the bi-modal, so color-blindness doesn't really apply with these signals.

by **mikerm** on Sat Apr 28, 2012 1:21 am

Those signals just confused and blew my mind. I would have no clue what to do with all that strange indication changing. :shock:

YouTube · by **signal-in-the-box** on Thu Jul 25, 2013 11:04 pm

Hey guys,

Sorry to dig up this old thread. Probably better than posting a new topic though.

Charlottesville's Bimodals
The city of Charlottesville uses no doghouses, only 4-sections with bimodal arrows. They are all LED, except for 1 remaining fiber-optic arrow that is currently not functional. All (or most) of the older LED bimodals are PSC. All of the newer ones are different, I don't know what the brand is. The PSCs have clear, smooth, rounded glass, and the new modules have frosted, textured, flat glass.
There are separate yellow and green LED filament lights next to each other, and those sets repeat to form an arrow, making two overlapping arrows.
Here is a compilation video of a PSC bimodal arrow:
http://www.youtube.com/watch?v=zpN-sp0RhS0

Here is a short video of the newer module type:
http://www.youtube.com/watch?v=XxjV0ivfbkc

Here is a video of the full cycle for a right turn 4 section w/bimodal (the video isn't sideways):
http://www.youtube.com/watch?v=JkhY6fwtqj4

Then there are some redundant bimodal arrows. A few 3-section signals had the green arrow fitted with a bimodal, but didn't have the middle yellow abandoned. The two yellows are lit at the same time.
There are also a few 4-sections w/ bimodals that cycle as a normal R-Y-G-GA signal, so both yellows are lit at the same time also.
I have videos of all of the 3-section signals, but none of the 4-sections.
Here is one:
http://www.youtube.com/watch?v=EnGkEztnq7Y

An interesting company
Awhile ago, I saw a regular 12" 1-section signal with a red X and green ↓ being used for monorails in Disney World. I searched for a while and found this interesting company. They make traffic signals that appear to be made from CH R molds.
http://www.lanecontrols.com/
They make many LED multi-indication 1-section signals (In 8" & 12"):
O / O / O
X / O / ↓
X / X / ↓
X / ↓
← / ←
← / O
← / O
← / O

They offer regular signals too. They also offer blue and violet LEDs...

by **3Mfanatic** on Fri Jul 26, 2013 12:06 pm

I know people with certain color blindness don't like those. They're not very common around here outside of our 3-section FYAs.

by **EagleSignalFan** on Sun Jul 28, 2013 6:25 pm

signal-in-the-box wrote:Here is a short video of the newer module type:
http://www.youtube.com/watch?v=XxjV0ivfbkc

The "newer module type" looks like a Leotek to me. I once had a Leotek 12" green arrow module that had the same style lens as the bi-modal in this video. I actually like this style, as it appears to be an incandescent-look style module where you can not see the individual LEDs, and there is no change in the arrow's position when the color changes from green to yellow.

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