ok, i'm trying out the {{OneWay}} template here, look at the list of adjacent areas in the area info box. the idea is to use the icons instead of just labeling (One-way) because that can make the connecting area section huge and hard to read.
there are two icons:
⛔ or {{OneWay|NoEntry}} which means the adjacent area with this icon can't be entered from this current area
➡️ or {{OneWay|NoReturn}} which means the adjacent area with this icon does not connect back to this current area
the icons are made using unicode and CSS since images would clutter the recent activity log up every time the template was added to a page.
edit:nowiki