Priority Bus / bus comity system

The priority seat on public transportation often been neglected or not been fully utilized.
The priority seat system makes comity practical. Everyone can do comity, every seat is priority seat.

1.Every passenger can switch the button
on the handrail to express that
"I am willing to make a comity" or
"I am unable to make a comity".
2.The passenger who needs seats can
press the priority button when they
get on the bus.
3.At the moment, the seat nearby the
bus door will light on, to guide people
make comity and let the other to have
a seat.