I've discovered that the Quebec shaped lens signals for the colorblind are still being used, and new versions made. I thought they were all gone, because they were tested in Quebec and Prince Edward Island, but it was determined that they didn't help the colorblind. In the city of Longueuil, QC, EVERY signalized intersection still uses them. (* there are likely a few exceptions) Take a look for yourself, drop in to any intersection https://www.google.com/maps?q=Longueuil ... anada&z=13
All of the signals have LED indications of red squares, yellow diamonds, and green circles, plus yellow & green arrows.
The horizontal signals are some that are new and some that are old, does anyone know who makes those/what they are made of?
There are also many vertical signals, made of the square ped-signal-type housings, and sometimes regular housings for the yellow, green, and arrow sections.
I am very glad to see that all these classic signals are being used and copied, at least in this one city!
The 4-to-6 aspect signals have many many interesting configurations, and the intersections have many interesting setups, from what I've seen on street view. I have not been there. (I wish I lived there, because all this free time I have could be used actually taking pictures
)Classic Horizontal Signal Examples, click thumbnail
Longueuil, Quebec Shaped Lens Signals - Horizontal Examples
New-Style Vertical Signal Examples (my favorites of which are buttonbacks, made of vehicle & ped signal sections)
Longueuil, Quebec Shaped Lens Signals - Vertical Examples
But my guess is that you can not tell from a distance (ex. another intersection), which is probably part of the reason they were originally ruled ineffective. Though with LEDs, I think you can tell the shape from far enough away (ex. behind waiting traffic)
. To answer your question, from a distance, you can tell the red is a square, because they look slightly larger than the rest of the indications. As far as the yellow diamonds, from a distance, they do just look like a colored light. Both of these hold true for both day 
only if it's convenient for you. But not the ones in those pictures, those were just the best views I picked from 2 intersections. 
