Bus routes operating in DC or Maryland use only a number, or a letter and a number, as noted below.
Cut pile carpets cut the yarn tips so there arenât any loops. Cut pile carpets tend to be denser and softer than loop pile. There are several types of cut pile: 1  Plush has an even, smooth texture with a formal appearance.  Saxony has a smooth finish, but the fibers are longer and twisted to give each fiber more body.
Each of the fiber systems used in the manufacture of carpet can be divided into two classifications: staple and bulked continuous filament (BCF). Nylon is produced in both staple and BCF yarn. Olefin is typically produced in BCF only. Polyester is manufactured in staple only; cotton and wool are inherently staple.