Originally Posted by
sammy0623
fyi, as of the last time i was in the city, the conductor's train stops at the area on the platform that's maked with yellow/black striped tape. it's safe, but if you're worried, go to the striping, and get on the car there
That black & white zebra striped board is called the conductor's indication board. It tells the conductor that all cars of the train is safely within the station, and thus is safe to open all train doors on that side of the train.