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| Roads in Hawaii | |
|---|---|
| Name | Roads in Hawaii |
| Country | United States |
| State | Hawaii |
| Maint | Hawaii Department of Transportation, county public works departments |
| Length km | 3000 |
| Formed | 19th century |
Roads in Hawaii provide the primary overland transportation network across the Hawaiian Islands, connecting urban centers such as Honolulu, Hilo, Kahului, and Lihue with rural communities, harbors like Port of Honolulu and Hilo Harbor, and tourism destinations including Waikīkī, Nā Pali Coast, Haleakalā National Park, and Hawaii Volcanoes National Park. The system integrates state routes, county roads, and federally funded corridors that support carriers such as Hawaiian Airlines, Matson, Inc., and local transit agencies like TheBus (Honolulu), while linking to intermodal nodes including Daniel K. Inouye International Airport, Kahului Airport, and ferry services. Strategic corridors influence planning initiatives involving entities such as the Hawaii State Legislature, Federal Highway Administration, and regional planning agencies.
Hawaii’s roadway network spans the islands of Oʻahu, Hawaiʻi (island), Maui, Kauaʻi, Molokaʻi, and Lānaʻi and includes arterial highways on Interstate H-1, Interstate H-2, and Interstate H-3 on Oʻahu. Primary connectors include Hawaii Belt Road on Hawaiʻi (island), Haleakala Highway on Maui, and Kuhio Highway on Kauaʻi, serving tourism hubs such as Pearl Harbor, Diamond Head (Oʻahu), and Iolani Palace. The mix of coastal roads, mountain passes like Tantalus (Oahu), and rural lanes reflects terrain influenced by volcanoes like Mauna Loa and Mauna Kea as well as climate zones noted in studies by United States Geological Survey and National Oceanic and Atmospheric Administration.
Early pre-contact trails connected settlements and heiau such as Puʻukoholā Heiau National Historic Site and ʻIolani Palace grounds before 19th-century plantation-era roads linked sugar and pineapple operations like Alexander & Baldwin and C. Brewer & Co.. The arrival of steamships at Port of Hilo and military developments at Fort Shafter and Pearl Harbor accelerated infrastructure projects authorized by the Territory of Hawaii government and later by the State of Hawaii after 1959. Federal involvement through programs tied to the New Deal and the Interstate Highway System shaped corridors on Oʻahu, while works by the Civilian Conservation Corps and engineering firms such as Parsons Corporation influenced alignments. Landmark projects include construction of Likelike Highway and Pali Highway with ties to events like the Attack on Pearl Harbor and postwar urbanization of Honolulu.
State routes are numbered and maintained by the Hawaii Department of Transportation and include signed interstates Interstate H-1, Interstate H-2, and Interstate H-3 which are unique among United States Interstate Highway System members for being entirely within a state without crossing state lines. County roads fall under the jurisdictions of City and County of Honolulu, County of Hawaii, County of Maui, and County of Kauai with local numbering schemes affecting corridors like Kamehameha Highway and Pali Highway. Mileposts and control sections follow standards influenced by the American Association of State Highway and Transportation Officials and federal guidelines from the Federal Highway Administration.
Notable corridors include Interstate H-1 serving Waikīkī and Pearl Harbor, Interstate H-3 traversing Koʻolau Range to Marine Corps Base Hawaii, Kamehameha Highway reaching Kaneohe and Kāneʻohe Bay, Hwy 11 around Hawaii Volcanoes National Park, and the Hawaii Belt Road encircling much of Hawaiʻi (island). On Maui, Haleakala Highway connects Kahului to Haleakalā National Park, while Hana Highway provides access to Hana and the Road to Hana tourist corridor. Routes serving intermodal freight and passengers intersect with Daniel K. Inouye International Airport, ports like Kahului Harbor, and military installations including Schofield Barracks.
Maintenance responsibilities are shared among the Hawaii Department of Transportation, county public works departments, and contractors such as Granite Construction for resurfacing and bridge projects. Funding streams include allocations from the Hawaii State Legislature, federal aid via the Federal Highway Administration, and bonds administered by entities like the Hawaii Community Development Authority. Asset management practices use standards from the American Society of Civil Engineers and coordinate with emergency services including Hawaii Emergency Management Agency for resilience against hazards like Kīlauea eruptions, tsunamis monitored by the Pacific Tsunami Warning Center, and tropical cyclones tracked by the Central Pacific Hurricane Center.
Traffic patterns are influenced by commuter flows into Honolulu from suburbs such as Waipahu and Kailua and by visitor volumes to sites like Waikīkī and Haleakalā National Park. Regulatory frameworks draw on statutes enacted by the Hawaii State Legislature and enforcement by agencies including the Hawaii County Police Department and the Honolulu Police Department. Safety campaigns have involved partnerships with Hawaii Medical Service Association and organizations like MADD while studies by the National Highway Traffic Safety Administration and the University of Hawaii at Mānoa inform countermeasures such as rumble strips, guardrails, and speed zone ordinances near schools like Kamehameha Schools.
Planned initiatives include improvements to Interstate H-1 capacity, upgrades to Daniel K. Inouye International Airport access roads, resilience projects addressing sea level rise documented by the Hawaiʻi Climate Change Mitigation and Adaptation Commission, and alternative mobility proposals such as light rail studies tied to Honolulu Authority for Rapid Transportation. Challenges encompass limited land availability on islands like Oʻahu, environmental compliance with National Environmental Policy Act reviews, cultural site protections involving Office of Hawaiian Affairs and State Historic Preservation Division, and funding constraints amid competing priorities set by the Hawaii State Legislature and federal partners including the United States Department of Transportation.
Category:Transportation in Hawaii