Urban carrier is a term used to describe the various forms of transportation available in urban areas. This includes TAXI (4 letters), BUS (3 letters), TAXICAB (7 letters) and CAB (3 letters). Taxis are typically private vehicles that can be hired for a fee, while buses are public transportation vehicles that run on a fixed route. Taxicabs are similar to taxis but are usually larger and more expensive. Cabs are also similar to taxis but are usually smaller and less expensive. All of these forms of transportation provide an important service to people living in urban areas.