Black Top is a type of asphalt pavement that is used for roads, driveways, and parking lots. It is made up of a combination of aggregate materials such as gravel and sand, and is then mixed with asphalt cement. The term 'black top' comes from the fact that the asphalt cement used in the mixture is black in color. TAR (3 letters) is a type of asphalt that is used in the construction of Black Top. It is a thick, sticky substance that is heated and mixed with aggregate materials to form the asphalt pavement.