Describe the various types of rail company rolling stock.

The rail companies have a number of solutions available to meet the demand of customers to move various types of products. The rail companies have developed specialized rolling stock to support the various commodities being shipped. This rolling stock includes:

Boxcar (plain): Standardized roofed freight car with sliding doors on the side used for general commodities.
Boxcar (equipped): Specially modified boxcar used for specialized merchandise, such as automobile parts.
Hopper car: A freight car with the floor sloping to one or more hinged doors used for discharging bulk materials.
Covered hopper: A hopper car with a roof designed to transport bulk commodities that need protection from the elements.
Flatcar: A freight car with no top or sides used primarily for TOFC service machinery and building materials.
Refrigerator car: A freight car to which refrigeration equipment has been added for controlled temperature.
Gondola: A freight car with no top, a flat bottom, and fixed sides used primarily for hauling bulk commodities.
Tank car: Specialized car used for the transport of liquids and gases.

With these various types of rolling stock the companies can transport virtually any type of cargo.