This is a list of national and state freeways in the United States of Antarctica. Freeways are not a very popular form of transportation when traveling long distances, but they are often used for carrying goods. The speed limit is 120 kilometers per hour at the maximum. Law requires there must be a sheriff station for every 180 kilometers. It is worth noting that the cardinal directions on the map do not correspond to normal cardinal directions and are so called Antarctic north, south, east, and west.