While waiting for the subway, I noticed a yellow line and arrows on the floor, and people were standing on both sides of the door, not right in front of it. A foreign student once asked, "Can't I stand in front of the door?" ## The space in front of the door is the path for people getting off When the door opens, the people getting off come out first. If people are standing in front of the door, those getting off and those getting on bump into each other, and it takes more time. During rush hour, the trains get really packed. That's why the arrows on the floor make people line up on both sides of the door and leave the middle path clear. It isn't cutting in line; it's an agreement so that everyone can board quickly. ## Things to check before heading to the platform - **Direction and platform**: Even at the same station, the platform differs depending on the direction, so if you go the wrong way, you'll have to climb the stairs again. - **The exit at your destination and the nearest car**: You can check this in a subway app. If you board a car close to your exit, you spend less time walking after you get off. - **Behind the yellow line**: At stations without platform screen doors, the wind is strong and dangerous when a train comes in. - **Direction of the line**: Follow the arrows and stand on either side of the door. The order is to stand behind the person in front of you. ## Remember until you get off When the doors open, don't rush in right away; wait a moment until everyone getting off has come out. Thanks to this small rule, the platform moves more orderly than you'd expect, even when there are lots of people.