What I am confused about is that according to Cambridge Dictionary, the point where a train moves from one track onto the other is called "switches" in American English. The word is in plural.
Here is the definition from the above mentioned dictionary:
switches [ plural ] US (mainly UK points)
a place on a railway track where the rails (= metal bars on which the trains travel) can be moved to allow a train to change from one track to another
But in other dictionaries and in articles about trains, the word is used in its singular form e.g. train switch or just switch.
My assumption is that "switches" (pl) refers to the place where a train switches from one track to the other. When used in its singular form, "switch" refers to a device that shunts a train onto a different track.
Is my assumption incorrect? If so, please explain why the word switch in train related contexts is used both in plural and in singular and when it is correct to use the singular and the plural form.