That is possibly the most inefficient I'm not familiar with this technology. I'm sure I could figure out how to do it, but scanning the walls at every junction isn't the best way to travel, and in an emergency it would cause incredible delay. It also presumes that everyone who can't read the symbols is carrying a scanner around with them.
I mean if it works for you, I'm not saying don't do it. But it's not optimal, not with this station and these demographics.