Weird And Funny Things People Found On The Subway

From the ticket sales area, you will see turnstyles where you can enter the Metro that come with a card reader (in some stations they are older and in others they are more modern).

You should go through the turnstyle and put your card on the cardreader. You will see the light change from red to green indicating that you can go through. The screen of the reader will show you how many trips you have left (if you are utilizing a 20-trip card, the screen will read 19).