Gojomo's design could use windows instead of arrows, so that the toilet car's external signage can be seen from anywhere in the adjacent car's hall. At a 1:1 or

Gojomo's design could use windows instead of arrows, so that the toilet car's external signage can be seen from anywhere in the adjacent car's hall. At a 1:1 or 2:1 ratio, a passenger just has to look both directions and go toward the sign they see. At a 3:1 ratio, a passenger who doesn't see a toilet car out of either window could always walk to the door closest to them.