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.
Synthetic fibers represent the vast majority of the fiber used to manufacture carpet in the U.S. Each fiber type offers somewhat different attributes of durability, abrasion resistance, texture retention, stain and soil resistance, colorfastness, ease of cleaning and color clarity.