Trains run under the ground. 
The Prague Metro is a fast train system.
There are three main lines. The green line has 17 stations. The yellow line has 24 stations. The red line has 20 stations.
These lines form a big triangle. This helps people change trains. You can move between the lines at three special spots.
Some stations are very deep. One station has very long stairs. 
Millions of people ride these trains every year. It is a great way to travel.
The Prague Metro is a fast train network.
Some stations are very deep underground. The deepest one is Náměstí Míru. 

The Prague Metro is a fast train network in the Czech Republic.
The system works using three main lines.
Building the metro was a long and changing project. 
There are many interesting facts about the stations and trains. 

You can see how the metro connects to the rest of the world. 
The Prague Metro is a high-capacity rapid transit network located in Prague, Czech Republic.
The network is organized into a radial layout.
The current system consists of three active lines and one line under construction. 
Construction methods for the stations vary based on their depth. Many city center tracks were created using a tunnelling shield. Other outer sections were built using the cut-and-cover method. These cut-and-cover stations sit only a few meters below the surface. The depth of the system changes significantly across the city. Náměstí Míru is the deepest station in the network. Some stations feature large tunnels with track tunnels on either side. Others have straight ceilings supported by columns. Many stations are also decorated with colorful aluminum panels.
The history of the metro began with early proposals. 
Two distinct types of rolling stock operate on the tracks. 

The system is a massive operation with significant passenger volume. In 2021, the metro served 568 million passengers. This averages to about 1.55 million passengers every day. The service is highly frequent during busy periods. During rush hours, trains arrive every two to three minutes. At other times, intervals range from four to ten minutes. The entire system is controlled automatically from a central dispatching center. This center is located near the I.P. Pavlova station. This automation helps maintain the complex schedule of the city's transit.
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