This smart man:

The main cause of delays and failures in the Moscow metro - passengers' - said Liksutov.
I can’t ride, haha.

The main problem is in very smart passengers who want to get under the turn to drive in the opposite direction while sitting. They are expelled. This takes a lot of time. You can’t get on the train for at least one reason. There is no guarantee that this train will go back now.
In addition, a penalty is imposed for traveling. All 80 people can be formed by one police officer. No hurry...

And there are people who keep the door, yes...

There will always be the next train.