Given rail transport's tremendous efficiency and cost effectiveness, there are many different forms of rail in use today. Ranging from small to large, they all serve a basic purpose: to move people and freight. Here is a basic overview of the railroad industry's main components.
Two very symbolic and perhaps widely known components of the locomotive are the bell and the horn. Both are vital safety features, however, the bell's use predates the locomotive to the days of horse-drawn street cars and carriages.
Since its birth, the railroad has employed a variety of signaling methods to communicate with locomotive crews as to what course of action they must take, mile by mile, in order to safeguard themselves from possible collision.