In Japan, they have three kinds of seats.
PRIORITY SEATS - For those who take the seat first. Its for tired
people to sleep.
LOVE GIVING SEATS - To be given up to the elderly / needy.
NORMAL SEATS
I dunno why Singapore uses the word priority... cos it can actually
also mean... since I sit first, I get the priority not to give up
the seat to others.
It is called that way Internationally.Here are the people who
should have excess to 'Priority seats' in Japan
1) Mothers with a small child/ children
2)Pregnant people
3)Senior citizens
4) Injured people
However it didnt mentioned anything about the mentally
handicapped or the physically impaired but as a human being
one should know how & when to agak agak la!