Is that going to be a thing ? I often liked the british signaling system because of the spatial displacement of aspects such that even if you're colorblind you can still tell what it might be from their pattern; contrast to, say, German one where despite the slight pattern by distant signal it's very slight. Is there any review of it's effect or such ?
(I also lament the stiff-looking gantries, but hey, at least you got quite some flying junctions I see.)
LED signals are already very much a thing all over.
They are far superior in every way to the traditional colour-light signals. Much smaller, more reliable, much better sighting and brightness (especially in fog and poor viability). Also you can see the signal at various angles instead of head on, and they are a lot more visible in time of direct sunlight which is a major bonus
Also I wouldn't worry about the colour-blindness concern. No one would be driving if they were colour-blind
Besides there are varying patterns depending on the placement of the signal and the sequence.
For example there are 3 aspect signals which can show two yellows, and ground-placed or co-acting signals where the red is at the top and not the bottom