| Route |
Name |
Termini/misc
road info |
Mileage |
(part) |
Kaumualii
Highway |
JN 
Kuhio Highway at  Rice Street in Lihue, west to JN  Lio Road near Barking Sands Pacific Missile Range Facility; named for King Kaumualii, last king of Kauai before it joined the united Kingdom of Hawaii under Kamehameha the Great in 1810; , along with and  , were sometimes called "Kauai Belt Road" up to the 1980s |
32.6
miles |
(part) |
Lio Road |
JN
Kaumualii Highway, to JN Kao Road |
0.3
miles |
(part) |
Kao Road |
JN Lio Road, to north entrance to Barking Sands Pacific Missile Range Facility; this and preceding segment added to original route 50 sometime in 1960s |
0.1
miles |
Former
 |
Rice
Street
(part) |
JN Kaumualii Highway Kuhio Highway in Lihue, east to JN  Rice Street and Kapule Highway; appears as numbered road in 1969 and 1973 maps, but subsequent history is unknown |
1.0
miles |
(part) |
Waapa
Road
(part) |
JN  Nawiliwili Road near Nawiliwili Harbor, north to JN Rice Street; Waapa Road continues south of JN as unnumbered road to Nawiliwili Harbor; originally eastern end of route 50 |
0.1
miles |
(part) |
Rice
Street
(part) |
JN Waapa Road in Lihue, to JN Kapule Highway; originally part of route 50, along with the rest of Rice Street |
0.7
miles |
(part) |
Kapule
Highway |
JN Rice Street, north past Lihue Airport to JN Kuhio Highway; final segment of route, north of airport, completed August 1988; originally route 510, though number may have changed to 51 by the time the road was built |
2.6
miles |
Former
 |
See listings below after  listings |
 |
Kuhio
Highway
(part) |
JN Kaumualii Highway at Rice Street in Lihue, north and west to JN in Princeville, 0.16 miles west of town entrance at Ka Haku Road; at least northwesternmost 7.6 miles originally part of route 560; part of southern end of route, north of JN Kapule Highway, once included a contraflow lane, as well as a three-lane crossing of the Wailua River with one northbound lane on a converted cane haul bridge; crossing widened to four-lane divided in 2011, with the former cane haul bridge converted to two northbound lanes, and the former contraflow lane on the parallel bridge becoming a full-time southbound lane; highway named for Prince Jonah Kuhio Kalanianaole, former territorial delegate to Congress after Hawaii's annexation by the United States |
28.1
miles |
| Photos |
"Temporary"
bypass
|
Ala
Kianoika
Way
("Kapaa
bypass") |
See  listing below at end of table |
Former
(part) |
Koolau
Road |
JN Kuhio Highway near Papaa Stream, northwest to JN near Pilaa; bypassed by new alignment August 1965; paved but one-lane and/or winding in places; may once have been part of route 560 |
3.5
miles |
Former
(part) |
Kolo
Road |
JN Kuhio Highway east of Kilauea village, west to JN west of Kilauea; this segment, through Kilauea village, bypassed to the south of the village November 1973; may once have been part of route 560 |
1.0
miles |
Former
(part) |
Kalihiwai
Road |
JN Kuhio Highway west of Kilauea village, west to JN near Princeville Airport; bypassed by new inland alignment December 1963; original bridge over Kalihiwai River was destroyed in 1957 tsunami, and was replaced by temporary bridge, but after the bypass was built, the temporary bridge was dismantled and never replaced; no remnants of any old route signage, at least east of Kalihiwai River; once part of route 560 |
2.1
miles |
| ROAD CLOSED TO THROUGH TRAFFIC, by permanent bridge closure in middle of this segment at Kalihiwai River. |
 |
Kuhio
Highway
(part) |
JN Kuhio Highway in Princeville, west to end of road within parking lot at Haena State Park; originally part of route 56; has nine one-lane bridges; Hawaii DOT considered replacing old one-lane bridges with modern two-lane bridges, but it abandoned that effort for the key Hanalei River bridge in 1987, and in 1988 started restoration of its original one-lane bridge structure (followed by more extensive restoration completed in 2003) |
10.0
miles |
Photos
Bridge log |
This part of the Kuhio Highway is listed on the National Register of Historic Places. |
 |
Nawiliwili
Road |
JN Waapa Road near Nawiliwili Harbor, west to JN Kaumualii Highway in Lihue; route number 58 previously assigned to what is now  Kuamoo Road in Wailua; originally designated as route 501 (route number was changed in late 1960s) |
2.1
miles |
County
(part) |
Maluhia
Road |
JN Kaumualii Highway near Knudsen Gap, through Koloa Tree Tunnel, south to Koloa town at JN   Koloa Road; (part of?) former route 52 |
3.3
miles |
| Photo |
County
(part) |
Koloa
Road
(part) |
JN Maluhia Road Koloa Road in Koloa, west to JN Poipu Road  Koloa Road; (part of?) former route 52 |
0.1
miles |
| Photo |
County
(part) |
Poipu
Road
(part) |
JN Koloa Road, south to Poipu at JN Lawai Road Poipu Road; may have been part of former route 52, or former route 53, though Hawaii DOT planning documents from the 1960s suggest it was never part of either route |
1.6
miles |
County
(part) |
Lawai
Road
(part) |
JN Poipu Road in Poipu, south to JN Hoonani Road Lawai Road; may have been part of former route 52, or former route 53, though Hawaii DOT planning documents from the 1960s suggest it was never part of either route |
0.1
miles |
County
(part) |
Hoonani
Road
(part) |
JN Lawai Road, south to JN Hoonani Road at Koloa Landing (end of numbered route indicated by faded terminal milepost 5.08); may have been part of former route 52, or former route 53, though Hawaii DOT planning documents from the 1960s suggest it was never part of either route |
0.2
miles |
 |
Ala Kinoiki
(Poipu-
Koloa
Bypass
Road) |
JN Maluhia Road north of Koloa, east of Koloa then south to JN Poipu Road and Pe'e Road in Poipu Beach; new eastern bypass of congested Koloa town center for traffic to or from Poipu Beach; recently opened (probably sometime in 2003 or 2004) |
2.9
miles |
County
 |
Koloa
Road
(part) |
JN Kaumualii Highway at Lawai, to JN Koloa Road and Poipu Road; (part of?) former route 53 |
3.4
miles |
 |
Halewili
Road |
JN
Kaumualii Highway at Kalaheo, west to JN
Kaumualii Highway at Port Allen/Eleele |
3.9
miles |
 |
Waialo
Road |
JN
Kaumualii Highway at Port Allen/Eleele, south "End State Highway" sign at Hanapepe Bay |
0.4
miles |
County
 |
Lele Road |
JN
Kaumualii Highway at Hanapepe, south to end of road at Port Allen Airport;
appears on 1962 state highway map; official reports indicate it was removed from state highway system later in the 1960s, and not transferred into
the numbered county route system; that notwithstanding, there are route shields at JN indicating the route number, though there is no other route signage |
0.8
miles |
(part) |
Waimea
Canyon
Drive |
JN Kaumualii Highway in Waimea, north to JN  Kokee Road; winding and steep (posted for 25mph); some maps show this as part of former route 55, though most indicate that route 55 started in Kekaha rather than Waimea |
6.8
miles |
(part) |
Kokee
Road
(part) |
JN Waimea Canyon Drive Kokee Road, along west side of Waimea Canyon ("Grand Canyon of the Pacific"), north to entrance to Kokee State Park; part of former route 55 |
7.3
miles |
Former
(part) |
Kokee
Road
(part) |
JN Kokee Road at entrance to Kokee State Park, north to entrance to Kalalau Overlook parking lots; now under jurisdiction of state park system;  also included the Kokee Road part of , the roads that now form , and the unconnected road listed after the following note; route 550 milemarkers continue within park, to terminal milepost at Kalalau Overlook |
5.1
miles |
| See the discussion in the FAQs of abandoned attempts to extend Kokee Road, to connect with the following northern segment of and form a complete loop highway around Kauai. |
Former
(part) |
Wainiha
(Powerhouse)
Road
|
JN Kuhio Highway west of Wainiha, south to end of pavement; winding and narrow; appears as numbered route on official maps in 1960s, and others in early 1970s, but not on maps 1973 and later; see preceding note on abandoned plans to connect this road with the rest of former route 55 |
1.9
miles |
County
(part) |
Alae
Road |
JN Kaumualii Highway in Kehaha, north to JN Kokee Road; originally part of route 550, and before then part of former route 55 |
0.3
miles |
County
(part) |
Kokee
Road
(part) |
JN Alae Road in Kekaha, north to JN Kokee Road and Waimea Canyon Drive; winding and steep; originally part of route 550, and before then part of former route 55 |
7.3
miles |
|
See listing above after and  listings |
 |
Ahukini
Road
(part) |
JN Kuhio Highway in Lihue, east to JN Ahukini Road Kapule Highway at entrance to Lihue Airport; completed June 1965; former route 57 |
1.1
miles |
|
Ahukini
Road
(part) |
JN  Ahukini Road Kapule Highway at entrance to Lihue Airport, east to Ahukini Recreation Pier State Park northeast of the airport; road within jurisdiction of Hawaii DOT's Airports Division; some unofficial maps indicate that this road used to be part of state route 570, or former state route 57, but official maps indicate that those routes have always ended near airport entrance (either at its present terminus, or per 1963 U.S. Bureau of Public Roads document, about 0.4 miles further east) |
1.8
miles |
 |
Kuamoo
Road
(part?) |
JN Kuhio Highway at Wailua, west to ford crossing of stream south of Wailua Reservoir; road continues beyond ford as unpaved one-lane road; old terminal milepost 4.83 at agricultural research station suggests route used to end there; former route 58 |
6.7
miles |
County
(part) |
Kukui
Street |
JN Kuhio Highway at Kapaa, west to JN  Olohena Road; some maps erroneously show route 581 running instead over Lehua Street, parallel to and one short block north of Kukui Street |
0.1
miles |
County
(part) |
Olohena
Road
(part) |
JN Kukui Street, west to JN Kamalu Road |
3.3
miles |
County
(part) |
Kamalu Road |
JN Olohena Road, south to JN Kuamoo Road |
1.6
miles |
 |
Maalo Road |
JN Kuhio Highway at Kapaia, to end of pavement past second parking apron at Wailua Falls; last half of road narrow and rough; part of road may be under private rather than state ownership |
3.9
miles |
According to
Hawaii DOT, there were plans to extend  to and then extend either or north to between Kilauea and Princeville, to provide a shortcut between Lihue and Kauai's north shore. The planned extension would have been a non-Federal aid highway, not necessarily part of the state highway system. I have no details on the abandonment of these plans (apparently sometime in the 1980s), though difficult terrain and perhaps weather (the proposed route would have passed a few miles east of the Waialeale summit, the world's rainiest place) might have had something to do with it. |
Former
 |
(unknown) |
JN Maalo Road at mile 2.8, west to the Wailua River (south fork); apparently route 583 used to include this segment rather than turning northeast to Wailua Falls, at least up to 1973 (per state highway map; parallel 1978 map shows current Wailua Falls routing) |
~2.0
miles |
| NOW PRIVATE ROAD, CLOSED TO PUBLIC. |
 |
Ala
Kianoika
Way
("Kapaa
bypass") |
JN north of Kapaa near the intersection with Hauaala Road, south through roundabout intersection at JN west of downtown Kapaa, then south and east to JN Kuhio Highway in Wailua across from Coconut Marketplace; as of 2005, not assigned a separate route number, but was milemarked as a branch of route 56; current route number signage limited to small "5600" number plates under milemarkers; most of bypass built in August 1996 by paving old cane haul roads, with remainder opened January 2007; originally limited mainly to daytime hours, with seasonal closures, but those restrictions have been removed; last I heard, Hawaii DOT was planning (but had not lined up funding for) some kind of permanent bypass, but don't hold your breath waiting for removal of the existing "temporary" bypass |
3.4
miles |
| ONE-WAY SOUTHBOUND, north of JN . |
State route; 
County route; 
Former route; 
