The Hawaii Department of Transportation (HDOT) maintains the smallest state-maintained system of state highways in the country. It consists of Interstates, state highways, and secondary state highways, totaling approximately 1,013 miles (1,630 km).^[1]

The state's four Interstates, all located on O‘ahu, are built to mainland standards unlike their counterparts in Alaska and Puerto Rico. The first three routes (H-1, H-2, and H-3) were approved in 1960, while an auxiliary route (H-201) was added in 1989.^[2]

Primary and auxiliary interstates

Number	Length (mi)[3]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
H-1	27.149	43.692	Route 93 in Kapolei	Route 72 in Honolulu	01960-01-011960	current
H-2	8.319	13.388	H-1 in Pearl City	Route 99 in Wahiawa	01960-01-011960	current
H-3	15.316	24.649	H-1 / H-201 in Halawa	Marine Corps Base Hawaii	01997-01-011997	current
H-201	4.075	6.558	H-1 in Halawa	H-1 in Honolulu	01989-01-011989	current	Was signed as Route 78 until 2004

Primary and secondary routes

The current state (then territorial) highway numbering system was established in 1955. Route numbers are organized so that the initial digit corresponds to the island:

• Numbers beginning with 1 or 2: Hawaiʻi
• Numbers beginning with 3: Maui
• Numbers beginning with 4: Molokaʻi, Lānaʻi
• Numbers beginning with 5: Kauaʻi
• Numbers beginning with 6 to 9: Oʻahu

In general, two-digit numbers are primary highways, maintained by the state. Three-digit routes are typically secondary arterials or collectors, while four-digit routes are typically collectors and minor roads. For secondary routes, the first two digits generally relate to the associated primary route. Many secondary routes are county-maintained and unsigned, their route numbers being used merely by state agencies as an asset-tracking measure.^[4]

When referring to highways, Hawaiʻi residents usually refer to state highways by their names instead of their route numbers (e.g. Kamehameha Highway instead of Route 99). Note that one named highway may encompass several route numbers (e.g. Kamehameha Highway, which carries Routes 80, 83, 99, and 830 at various points along its length) and vice versa.

Number	Length (mi)[3]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Route 10	—	—	Hoʻokena	Route 11	—	—	Possibly unbuilt, shown on 1973 map
Route 11	121.970	196.292	Route 19 / Route 190 in Kailua-Kona	Route 19 in Hilo	01955-01-011955	current	Volcano Road, Māmalahoa Highway, Kuakini Highway, Queen Kaʻahumanu Highway. Part of the Hawaiʻi Belt Road
Route 12	—	—	Route 11 in Hilo	end of pavement east of Hilo	—	—	Replaced by Route 120 (now Route 1370 and Route 137)
Route 13	—	—	Wahaʻula Heiau	Route 11 in Keaʻau	01955-01-011955	—	Replaced by Route 130
Route 15	—	—	Route 11 in Pāhala	Route 11 in Pāhala	—	—	Now Maile Street and Kamahi Street
Route 16	—	—	Route 11 in Kēōkea	Route 11 in Captain Cook	—	—	Became Route 160 (or County Route 160)
Route 18	11.1[5]	17.9	Route 11 in Honalo	Route 19 in Palani Junction	01955-01-011955	—	Downgraded to County Route 180
Route 19	99.490	160.114	Route 11 / Route 190 in Kailua-Kona	Port of Hilo	01955-01-011955	current	Bay Front Highway, Hawaiʻi Belt Road, Māmalahoa Highway, Queen Kaʻahumanu Highway
Route 20	—	—	Route 19 south of Waimea	Route 19 in Hilo	01955-01-011955	—	Replaced by Route 200 and County Route 200
Route 21	1.8[6]	2.9	Route 20 in Hilo	Route 19 in Hilo	01955-01-011955	—	Downgraded to county road; now Wainaku Street
Route 22	3.7[7]	6.0	ʻAkaka Falls State Park	Route 19 in Honomū	01955-01-011955	—	Replaced by Route 220
Route 24	—	—	Waipiʻo Valley Road	Route 19 southeast of Honokaʻa	—	—	Replaced by Route 240
Route 25	—	—	Route 19 in Waimea	Route 27 in Hāwī	—	—	Replaced by Route 250 (portions now Route 19)
Route 26	—	—	Kawaihae	Route 25 near Waimea	—	—	Replaced by Route 19 and Route 270
Route 27	—	—	west of Hāwī	Pololū Valley Lookout	—	—	Replaced by Route 270
Route 27A	—	—	Route 270	Route 19	—	—	only shown in 1985-1986 Gousha road atlases
Route 30	41.615	66.973	Route 32 in Wailuku	Route 340 near Kapalua	01955-01-011955	current	High Street, Honoapiʻilani Highway
Route 31	7.149	11.505	Wailea Ike Drive in Kīhei	Route 310 / Route 311 in Kīhei	01955-01-011955	current	Piʻilani Highway
Route 32	2.848	4.583	Route 30 / Route 320 in Wailuku	Route 32A in Kahului	01955-01-011955	current	West Main Street, Kaʻahumanu Avenue
Route 32A	0.393	0.632	Route 36 in Kahului	Gate at pier 1 at Kahului Harbor	—	—	Hobron Avenue: Former Route 361
Route 32B	0.168	0.270	Route 32 in Kahului	Parking lot at pier 2 at Kahului Harbor	—	—	Wharf Street: Unsigned
Route 33	0.5[8]	0.80	Route 32 in Wailuku	Route 330 in Wailuku	01955-01-011955	—	Downgraded to an extension of County Route 330
Route 34	0.5[9]	0.80	Koa Drive in Wailuku	Route 32 in Wailuku	01955-01-011955	—	One section became Route 3400, remainder became county roads
Route 35	7.6[10]	12.2	Route 31 in Kīhei	Route 32 in Kahului	01955-01-011955	—	Replaced by Route 350
Route 36	16.214	26.094	Route 32 in Kahului	Route 360 / Route 365 near Haʻikū	01955-01-011955	current	Hāna Highway: Originally ran to Route 31, but this section became Route 360
Route 36A	0.506	0.814	Route 36 in Kahului	Airport Road in Kahului	—	—	Haleakalā Highway, Keolani Place: Was a portion of Federal-aid route 37; originally signed as Route 396
Route 37	21.344	34.350	Route 31 near Kula	Route 36 in Kahului	01955-01-011955	current	Haleakalā Highway, Kula Highway
Route 38	6.2[11]	10.0	Route 30 in Māʻalaea	Route 36 in Kahului	01955-01-011955	—	Replaced by Route 380 and County Route 390
Route 39	12.4[12]	20.0	Route 36 in Pāʻia	Waihou Spring Forest Reserve	01955-01-011955	—	Downgraded to Route 390
Route 40	1.3[13]	2.1	Route 30 in Waikapū	Route 38 near Waikapū	01955-01-011955	—	Downgraded to County Route 305
Route 44	8.8[14]	14.2	Route 442 in Lānaʻi City	Kahokunui	01955-01-011955	—	Western section became County Route 430
Route 45	27.5[15]	44.3	Route 46 in Kaunakakai	Hālawa	01955-01-011955	—	Replaced by Route 450
Route 46	16.6[16]	26.7	Maunaloa Road in Maunaloa	Kaunakakai Wharf	01955-01-011955	—	Replaced by Route 460
Route 47	5.8[17]	9.3	Route 46 in Kualapuʻu	Palaʻau State Park	01955-01-011955	—	Replaced by Route 470
Route 48	5.2[18]	8.4	Anahaki Road in Hoʻolehua	Route 47 in Kualapuʻu	01955-01-011955	—	Partially replaced by Route 480; remainder now an unnumbered road
Route 50	32.920	52.980	Pacific Missile Range Facility	Route 56 in Līhuʻe	01955-01-011955	current	Kaumualiʻi Highway: Section along Rice Street became Route 51
Route 51	3.452	5.555	Route 58 in Līhuʻe	Route 56 in Līhuʻe	01955-01-011955	current	Waʻapa Road, Rice Street, Kapule Highway: Former portion of Route 50
Route 52	—	—	—	—	—	—	Downgraded to County Route 520
Route 53	—	—	—	—	—	—	Downgraded to County Route 530
Route 54	—	—	—	—	—	—	Replaced by Route 540
Route 55	20.7[19][20]	33.3	Route 50 in Kekaha	Route 56 in Wainiha	01955-01-011955	—	Replaced by Route 550 and county roads
Route 56	28.120	45.255	Route 50 in Līhuʻe	Route 560 in Princeville	01955-01-011955	current	Kūhiō Highway: much of route possibly former Route 560; Kalihiwai bypassed in 1963, Koʻolau bypassed in 1965 and Kilauea bypassed in 1973
Route 57	1.1[21]	1.8	Route 56 in Līhuʻe	Līhuʻe Airport	01955-01-011955	—	Replaced by Route 570
Route 58	2.047	3.294	Route 50 in Līhuʻe	Route 51 near Nāwiliwili Harbor	—	—	Nāwiliwili Road: Originally designated as Route 501
Route 58	—	—	—	—	—	—	Replaced by Route 580
Route 61	10.586	17.037	Route 6001 / Route 6010 in Kailua	Route 98 in Honolulu	01962-01-011962	current	Pali Highway, Kailua Road: Originally planned to begin at Route 92
Route 62	—	—	Route 92 in Honolulu	Route 90	—	—	Appears on 1962 state route map and 1969-1970 street maps; deleted after 1967
Route 63	8.299	13.356	Route 92 in Honolulu	Route 83 / Route 830 in Kāneʻohe	—	—	Kalihi Street, Likelike Highway
Route 64	2.605	4.192	Route 92 in Honolulu	Entrance to Sand Island State Recreation Area	—	—	Sand Island Access Road: Possible former Route 640
Route 65	4.148	6.676 Zdroj:https://en.wikipedia.org?pojem=Hawaii_Route_122 Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.  Navigácia: Veda > Analytika Antropológia Aplikované vedy Bibliometria Dejiny vedy Encyklopédie Filozofia vedy Forenzné vedy Humanitné vedy Knižničná veda Kryogenika Kryptológia Kulturológia Literárna veda Medzidisciplinárne oblasti Metódy kvantitatívnej analýzy Metavedy Metodika Metodológia vedy Náboženstvo a veda Náučná literatúra Podvody vo vede Popularizácia vedy Potravinárstvo Prírodné vedy Pseudoveda Scientometria Spoločenské vedy Teórie Teatrológia Technické vedy Technika Terminológia Umenie Výskum Veda Veda a technika podľa štátu Veda a technika podľa kontinentu Veda a technika podľa roka Veda v kozme Vedci Vedecká literatúra Vedecké databázy Vedecké experimenty Vedecké konferencie Vedecké metódy Vedecké ocenenia Vedecké organizácie Vedecké parky Vedeckí spisovatelia Vzdelávanie Záhady Príbuzné výrazy: Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia. www.astronomia.sk | www.biologia.sk | www.botanika.sk | www.dejiny.sk | www.economy.sk | www.elektrotechnika.sk | www.estetika.sk | www.farmakologia.sk | www.filozofia.sk | Fyzika | www.futurologia.sk | www.genetika.sk | www.chemia.sk | www.lingvistika.sk | www.politologia.sk | www.psychologia.sk | www.sexuologia.sk | www.sociologia.sk | www.veda.sk I www.zoologia.sk