Hi!  I work in a factory.  What do you do?
Large factories often are located where they have access to multiple modes of transportation. Railways, highways, and water transport are important to the business' success.
I agree.  There are many large roads near this factory.  What do you do for a living?
Factories often use rail transport to transfer goods on wheeled vehicles running on tracks.
I agree.  I've seen that type used.
Rail transport got its roots in the 6th century BC in Ancient Greece.
That's very interesting.  I wouldn't have thought that it was so long ago.
I imagine their construction is different today. Now the tracks are made of steel rails, installed on ties and ballast. The rolling stock fitted with metal wheels moves on this.