Isolated from the mainland, Honolulu is reached primarily by plane. Honolulu International Airport, a major center for Pacific air travel, is served by 31 domestic and foreign airlines as well as inter-island carriers. Hawaii's Department of Transportation is arranging for the airport to undergo a terminal modernization project. Honolulu may also be reached by ship; cruise lines sail regularly between Honolulu and SanFrancisco.
Because of the irregular shape of the city, Honolulu residents define directions according to landmarks such as the mountains and the sea rather than standard compass orientations.
TheBus, owned by the City and County of Honolulu but operated separately, provides public transportation to the entire island on a fleet on 525 buses. Oahu Transit Service also has a fleet of 100 buses equipped to transport people with disabilities. The Waikiki Trolley Service, with a fleet of 50 trolleys, provides transportation to shopping centers, museums, and other points of interest.