I know this has been mentioned a lot but omg one way doors are essential for an international airport. I cannot have a proper flow of passengers and passengers will go to the wrong bathrooms in the wrong parts of the airport etc. It is something that is really needed ASAP.
Yes, I second this. I eventually closed the bathrooms in the arrivals area, meant for arriving pax, as departing pax were using them and missing their flights.
I did build another set of bathrooms in the departure area, so that they didn’t complain about no bathrooms at all.