A bit of an off-topic: I only ever saw white traffic lights in the US and Canada (specifically, pedestrian traffic lights) and they confused me a lot at first - the rest of the world uses green. The icons displayed (hands) are confusing too: the rest of the world uses an icon of a man walking or standing.
I agree with you. When I'm in the US I keep scanning for a green light, so it takes me a while to find "the white man" telling me it's OK to cross.