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Composition of urban rail transit
Today, my family went to Chongqing. I heard that the Chongqing subway was opened, so I went to take the subway to taste the fresh food.

When I arrived at the subway station, I felt dizzy. It took me a long time to transfer to the ticket vending machine of Metro Line 1. There are coin slot, zero-fill slot and exit slot respectively.

Mouth, and the mouth to receive paper. After I put coins into the slot, it didn't take long for two subway cards to fall into the slot.

After the scissors-like subway entrance, take the elevator to the waiting hall of the subway station. As soon as I entered the hall, I was dumbfounded: the waiting hall was crowded with people. We struggled to the entrance of the train, and bang, the subway train arrived. At first, I found that the train door was opened behind the glass door. I think it's because I don't want the person in front of the door to fall on the railway. Just entered the door, wow, a lot of people, but very quiet, it seems that everyone is enjoying the happiness brought by the subway! When I squeezed in, I felt like a small sardine, stuffed into this can car. I suddenly feel foggy, like entering a time machine.

The speed of the subway is not bragging. As soon as I grabbed the railing slowly, I heard on the radio that I was at Erling Station. At this time, the people in the carriage flooded into the eling station like the tide. After a while, the carriage was empty, only a few people were left, so I lay quietly in my chair and looked at the subway tunnel. I saw the train shuttle on the track like an arrow. Ten minutes later, my mother patted me and said that Shapingba Station had arrived. At this time, I heard on TV that the maximum speed of the subway can exceed 120 km.

God, so soon. I'm surprised. It is much easier to get out of the subway. It didn't take long to get to the card recycling place, put the card into the recycling port, the scissors port opened automatically, and we went out smoothly.

Soon, we reached the ground, and then it dawned on me that I only walked underground for a while before I realized the convenience brought by modern transportation.