Can a Disabled Person Take an Able‐bodied Person’s Seat?
A disabled person is only justified in asking other passengers to get off so they can board. However, once they’ve boarded the people who got off should be allowed back on. If there’s suddenly no room for them after this one person got on board, then the disabled person should have waited for the next train/bus.
It’s one thing to have someone get off so you can board more easily. It’s another thing entirely to take their seat.