The traditional Metro Train is 6 cart train (from 1995 to 2007).
From this year, there are longer trains, so they put the sticker on the glasses of the door to indicate the location for the first 6 cart, and the following two – cart #7 and cart 8.
When train is approaching, there are broadcast to notify people about the number of train carts in the coming train, so people don’t need to wait before the rest of the gates, where there will be no train carts.
Look at these pictures:
DMG changed screen
The DMG (Digital Media Group) changed the LCD display to some new, and bigger one. Look at these nice display: