Hawaii has four federal highways: H-1, H-2, H-3, and H-201, all located on Oahu and all part of the Interstate Highway System. With the exception of H-201, which begins and ends on H-1, all the highways have at least one end point at or near a current or former military installation. A system of state highways encircles the other main islands as well as Oahu. Travel can be slow due to narrow winding roads on the coastlines. Travel can be significantly congested during morning and evening commute times in and out of Honolulu, particularly on the leeward side. H1 was constructed after Honolulu was well established, and on/off ramps are diverted throughout the city. Hawaii has one of the best public transit systems in the United States known as TheBus with over 4,200 stops on Oahu. It was ranked number one in the country for 1994-1995 and again in 2000-2001 by the American Public Transportation Association. Enterprise Honolulu | Public Transportation in Honolulu Oahu Hawaii
Aviation is an important part of Hawaii’s transportation network, as most interisland travel takes place using commercial airlines. Hawaiian Airlines, Mokulele Airlines, and go! use jets to travel between the larger commercial airports in Honolulu, Lihue, Kahului, Kona, and Hilo, while Island Air and Pacific Wings serve smaller airports. These airlines also provide air freight service between the islands.
A ferry linked to TheBus began service in September 2007 known as TheBoat. Fare for TheBoat is $2.00, and it runs from Barber's Point to Aloha Tower Marketplace daily. It is hoped that linking to TheBus and delivering commuters from Leeward to Honolulu will alleviate traffic. Norwegian Cruise Lines provides American-flagged passenger cruise service between the islands. The Hawaii Superferry is now connecting Maui and Oahu with a ferry system capable of transporting vehicles. Service was scheduled to begin in the second half of 2007 with routes from Oahu to Kauai and Maui. Legal issues over environmental impact statements and protests from residents of Maui and Kauai temporarily delayed the implementation of this service, but service to Maui started in December 2007, and service to Kauai is still delayed.