A transfer dump truck is based on a standard dump truck, pulling a separate trailer. Generally, it's used in carrying various materials, such as gravel, dirt, asphalt, and many others.
A standard dump truck is similar to a standard dump truck. It has a fixed, hydraulically adjustable bed and a relatively small wheelbase. A super dump truck is similar to a standard dump, but can carry more. The additional axles allow more load-bearing at up to 13, 000 pounds.