Display and significance of subway signal lights

The display and significance of subway signal lights are as follows:

1, red light

As the name implies, red light is a very dangerous situation when it is used to intercept trains, because if it is turned on, it is easy to have a rear-end collision, that is, the front car collides with the rear car.

Therefore, it is very dangerous if the train has not started to slow down and brake when the red light is on. So the red light, like the traffic light on the road, plays a warning role, that is to say, the train is not allowed to move forward.

2. Yellow light

This kind of light is also a warning function, mainly to warn the train to slow down, because if the train doesn't take corresponding measures when the yellow light is on, and the signal light in front is red, then the train is already very dangerous, just like the accident in beijing subway line 2.

Step 3 allow

The green light is simple, no different from the road. The main purpose of the green light is to keep the train moving, so the green light is to keep the train moving.

4. White light

Lights of this color are not common. What about some friends? I wonder what this lantern is for. In fact, white is used for reversing, and reversing is a good white light.

5. Blue

Blue light is to control the train, but not to control the train, but to remind the driver to carry out maintenance.