Have you ever heard of rail transport? It is also known as train transport.
I have! We recently got a new rail service in my town. It's really fascinating. I'll bet there's a lot of history behind rail transport.
That is extremely fascinating. In contrast to road transportation where the car is in control. On the rail the rail is in control.  
Well, that certainly makes sense! Do you think most trains are diesel or are some still coal powered?
I would imagine diesel, In fact, I am pretty sure the LYNX Blue Line is a light rail in Charlotte, NC that is diesel. 
Oh neat! I think the new train in my area is diesel as well. I would imagine using trains is very cost efficient for companies, cheaper than truck or air. Do you agree?
San Diego Trolley
The San Diego Trolley is a light rail system operating in the metropolitan area of San Diego. It is known colloquially as "The Trolley". The Trolley's operator, San Diego Trolley, Inc. (SDTI), is a subsidiary of the San Diego Metropolitan Transit System (MTS). The Trolley began service on July 26, 1981, making it the oldest of the "second-generation" light rail systems in the United States. The entire Trolley network serves 53 stations, and comprises of
Rail transport
Rail transport is a means of transferring passengers and goods on wheeled vehicles running on rails, which is also known as tracks. It is also commonly referred to as train transport. In contrast to road transport, where vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on ties (sleepers) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves.