On the other hand, building new bathrooms or expanding existing ones can be a long and expensive process, so improving the efficiency of existing resources can be a smart way to go.
One of the easiest ways to do this is to declare the bathrooms unisex, especially if you have a serious gender imbalance at work. I worked at a startup office that had a (typical) 80% male to female ratio, but the building was designed with two male and two female toilets.
These were the types of bathrooms that had a single toilet, a single seat, and a door for the whole thing, much like a bathroom in your home. Having such a bathroom be assigned to one gender only doesn't really make much sense, but it was especially apparent when there was frequently a line for the men's bathrooms while both womens were empty.
The video/gif on the article shows both men and women entering and exiting. There is only one LED. There is only one website. The diagram only shows three stalls. I venture to guess that this bathroom is already unisex.