@fuji; future_atc was talking about signs outside the aircraft next to taxiways, not in the cockpit, so with eyes correctly 'outside', you would see the signs.
@future_atc; Don't be disheartened, I think it is an interesting idea. I have often wondered whether
some ground movements could be "automatic" like public roads are, for example with traffic lights and the give way protocols we have at T junctions and roundabouts. (There are millions of barely skilled motorists out there who manage to negotiate this system without any input from an ATC type agency at all.) The 'follow the greens' system at airports is a very successful case in point, and they worked brilliantly at Heathrow - (probably still do but I don't fly there now).