Brief Explanation

Normally, women at an early stage of their pregnancy would have a minimal appearance in their belly for other people to realize that they may need to get priority in seating. Once Pink Lights were installed in a subway, more pregnant women were able to receive priority seats. It satisfied both public and pregnant women because when Pink Lights is NOT on, the priority seats don’t need to be left vacant and public can utilize the seats while there is no one who needs it.