In this category, carpeting applications all have one common feature: they must withstand heavy pedestrian traffic. This segment includes concourses and ticket counters of airports, bus stations and train depots, as well as employee lounges, sales service areas, merchandise showrooms and clerical areas. Carpeting for these areas must be exceptionally abrasion resistant, as it must withstand literally millions of people during its wearlife. Very dense loop constructions and durable pile fibers are needed in these types of projects. The carpet must also be colorfast and fade resistant, as airports and bus / train stations typically have large expanses of glass for sunlight. The carpet in these exposed areas must be fade resistant, or it will soon appear old and worn.