Expressway toilets that are particularly crowded during long holidays such as GW and summer vacation. In fact, many years of research have revealed the existence of "toilet that is not used even when it is crowded." It's a "rear toilet". Because we tend to use it from the toilet near the entrance, and once we have a queue, we tend to line up behind it.
Therefore, the congestion has been greatly reduced by using a design that makes good use of human characteristics so that the toilets in the back can be used as much as possible. For example, using a warm color system that makes people feel closer in the distance, draw illustrations that incorporate perspective, and use the savanna effect that makes people want to go to brighter places, and gradually lighting from the front to the back. Or brighten. At last, we adopted a device that leads to a toilet that is often empty, from the perspective of space design.

その効果はすぐに表れ、デザインの設置前後で手前のブースの利用が約8％奥のブースに移行し、まんべんなくトイレ全体が使われるようになりました。X（旧Twitter）などのSNSでは、お客さまからのお褒めの言葉も見受けられるようになりました。EXPASA富士川（下り）、愛鷹PA（上下）にお立ち寄りの際には、トイレ空間のデザインに注目してみてください。