What is the ball next to the handrail of the subway elevator?

It is mainly used to prevent people from using it as a slide on such a long slope. After all, the buffer space below is very small, and it is almost inevitable to rush down at high speed.

It turns out that Beijing subway is prevented by putting a flat metal signboard in the middle, but only one signboard is put in an elevator, and the remaining length of the elevator is still very dangerous for the slide, but putting too many text signboard is easy to cause the annoyance of ordinary people.

So I used the small hemisphere method. Often placed will not cause serious visual problems, but people who want to slide will immediately think about how painful their buttocks are. In addition to preventing people from playing as slides, it is more important to prevent some bastards from putting heavy objects such as suitcases on them and sliding down at high speed and hitting people.

Extended data:

Precautions for taking the subway:

1, the subway must be checked, and the luggage is limited. Just like taking a train or plane, taking the subway also requires security check.

2. It is forbidden to illegally carry guns, ammunition or crossbows, daggers, gasoline, fireworks and firecrackers and other state-regulated control devices, inflammable and explosive dangerous chemicals and other items that may endanger personal safety into the station.

3. Smoking is prohibited in stations and carriages.

It is forbidden to eat in elevators and carriages.

5. It is forbidden to bring animals (except guide dogs wearing signs and protective equipment to prevent injuries) into the station.

6. It is forbidden to bring bicycles (except folded bicycles) and other means of transportation into the station.

7. It is forbidden to carry inflatable balloons, sharp objects, easily dirty, with serious odor, unopened fragile articles and oversized luggage into the station.