[Clamchop]

Traffic lights still work without position, as they'd have to at night, in fog, in glare, and so on.

Point is, the meaning of the colors appears to be universally understood thanks to driving, and distinguishing the colors has been addressed.

If there are exceptions, I suppose localizations and accessibility modes are just the thing.

[throwawaaarrgh]

Colors do not have universal meaning. This web browser design might work in the US, but there are 194 other countries out there. (also, position does not fix the problem of traffic lights for the colorblind)

The idea that everybody else should have to change to fit crap design isn't a good argument. The design should be fixed, not monkey-patched for everyone but one use case.