Why do subway doors sometimes open on the left and sometimes on the right? I finally understand today

When riding the subway

Do you have such doubts?

Obviously the car on this side of the door

What if the door on the other side is opened at the next stop?

Why do trains going in the same direction

Sometimes I open the left door

Sometimes open the right door

Does it depend on the driver's mood?

When riding the subway

Which side of the train opens the door?

In fact, this is related to the form of the subway platform

Let’s take a look at the different types of platforms

Island platform

The platform layout between the up and down train lines is called an island platform. The island platform is the most common platform type we have, that is, the platform is in the middle, the track area is on both sides, and the two tracks on each side run trains in two different directions. One advantage of this platform is that if you find that you are sitting in the wrong direction, it is very convenient to return.

Side station

This type of platform is different from the island platform. It is distributed on both sides of the station. Passengers can only get on the train from one side, and there are tracks on only one side of the platform.

Compared with the island platform, its advantage is that the construction cost is low and it is easier to expand the waiting area later. The disadvantage is that if you find that you are sitting in the wrong direction, you cannot walk directly to the other side like on the island platform. You need to go through the station hall or underground passage to the opposite platform.

Double island platform

The combination of two island platforms, 4 tracks, and 4 platforms. This type of station platform usually means that the line is divided into large and small routes, or that there are fast and slow trains on the line. Beijing Subway National Library Station and Guogongzhuang Station are designed in this way.

Spanish platform

The principle is that one track consists of two sets of platforms for trains to stop. Sometimes, one platform is designed only for passengers to get off the train, while the other side is only for passengers to get on the train or wait for the train. Sometimes, passengers can get on and off freely on both sides.

For example, at Beijing's Xizhimen subway station, Line 13 is a three-story elevated station with three platforms on the ground floor. It has an island and two side platforms with three lines, and a Spanish platform layout. Passengers transferring from the other two lines to Line 13 (originating) go up to the island platform in the middle, while passengers arriving from Line 13 (terminal) get off or transfer at the side platforms on both sides. The second floor above ground is the station hall, and the first floor is the entrance and exit. The platform of Line 13 station is connected to the transfer hall on the underground floor through a continuous passage, and then connected to Line 2 and Line 4 stations through transfer passages.

Stacking platform

The most famous platform-stacked station is Nanluoguxiang Station on the Beijing Subway. The two-way tracks of the same line do not run in parallel, but are vertically overlapped one above the other, which is called "stacked".

Nanluoguxiang Station is a four-story underground station, with the first underground floor being the equipment floor, the second underground floor being the concourse floor for Line 6 and Line 8, the third underground floor being the side platform floor for Line 6 in the direction of Jin'anqiao and Line 8 in the direction of Zhuxinzhuang, and the fourth underground floor being the side platform floor for Line 6 in the direction of Lucheng and Line 8 in the direction of the National Art Museum of China.

After understanding the form of subway platforms, the editor can also reveal the secrets to you. In fact, the direction of the train door opening depends on the structural form of the subway platform. When the platform form of the previous station is different from that of the next station, the opening and closing direction of the train door may change.

When taking the subway, if the platform structure of the station in front of the train is different from that of the station behind, and the door opening side needs to be changed, there will be a voice prompt in the train and the corresponding prompt light will flash above the open door. Remember to take a look before arriving at the station.

Tips from the Editor

As winter arrives, we gradually wear more clothes, and the chances of clothes getting caught on the subway also increase. When clothes are caught by the door, do not pull hard, but gently pull them out. In most cases, they can be removed. If pulling and pulling still cannot remove them, you can remove them after the train opens the door at the next station. If the door on the other side of the train opens at the subsequent stations, you can contact the train driver for help by pressing the emergency help button in the car.

Source: Yitongxing (ID: gh_62452336546d)