Route Number	Names	West or South End	East or North End	Mileage
30	High St; Honoapiilani Hwy; Kahekili Hwy	HI 32 (Main St) at Iao Valley Rd (CR 3200)	transition to CR 340 (Kahekili Hwy)	41.67
Route 30 represents the main access road between the tourist areas of Lahaina, Kaanapali and Kahana with Kahului and Kahului Airport via Route 380 (Kuihelani Highway). The state route generally hugs the coastline from Kaanapali southward to Maalaea. This stretch includes a tunnel between Kamaohi and Mokumana Gulches.
31	Piilani Hwy	HI 310 (Kihei Rd) at HI 311(Mokulele Hwy)	Wailea Ike Dr (CR 3137)	7.15
Route 31 represents 7.15 miles of Piilani Highway from Kihei south to Keawakapu. Piilani Highway east from Ulupalakua is an unpaved roadway designated as unsigned County Route 31, though the highway was originally Route 31. Route 31 also followed Kihei Road west to Route 30 (Honoapiilani Highway), but that stretch was renumbered to Route 310.
32	Main St; Kaahumanu Ave	transition to Iao Valley Rd (CR 3200) west of HI 30	HI 32A (Hobron Av)	2.85
Hawaii Route 32 connects Downtown Wailuku with the central business district of Kahului along Main Street and Kaahumanu Avenue. The short state route is essentially unchanged from its original signing.
32A	Hobron Ave	HI 36 (Hana Hwy)	end of state maintenance at Kahului Harbor	0.41
Routei 32A constitutes a short spur along Hobron Avenue that links Route 32 and Route 36 (Hana Highway) with the Port of Kahului.
32B	Wharf St	HI 32 (Kaahumanu Av)	end of state maintenance at Kahului Harbor	0.17
36	Hana Hwy	HI 32 (Kaahumanu Av)	HI 360 (Hana Hwy) at Kaupakalua Rd (CR 365)	16.23
Route 36 follows the western third of Hana Highway from Kahului eastward to Lower Paia, Pauwela and County Route 365 (Kaupakalua Road). The state route used to continue all the way to Hana and the north end of Route 31, but that portion of Hana Highway was renumbered to Route 360.
36A	Haleakala Hwy; Keolani Pl	HI 36 (Hana Hwy)	end of state maintenance on Keolani Pl	0.51
Route 36A lines the westernmost section of Haleakala Highway linking Keolani Place (Route 380 south) with Hana Highway (Route 36 west) and Keolani Place entering Kahului Airport.
37	Haleakala Hwy; Kula Hwy	transition to county maintenance on Pillani Hwy north of Ulupalakua	HI 36 (Hana Hwy)	21.39
Route 37 runss southward from the Kahului Airport area along the western slopes of Puu Nianiau and Haleakala. The state route includes an upgraded expressway portion to Pukalani. Historically Route 37 continued west from the end at Hana Highway to Route 36 by Kanaha Ponds. A portion of Haleakala Highway through the airport was removed due to runway expansion. A stretch of Haleakala Highway remains west and east from Keolani Place ahead of the airport terminal. This includes a signed stretch of Route 36A.
310	North Kihei Rd; Piilani Hwy	HI 30 (Honoapiilani Hwy)	HI 31 (Piilani Hwy) at HI 311 (Mokuele Hwy)	3.60
A two-lane road straddling agricultural areas, marsh land and Maalea Bay between Route 30 (Honoapiilani Highway) and Route 311 north / Route 31 south (Piilani Highway).
311	Puunene Ave; Mokulele Hwy	HI 31 (Piilani Hwy) at HI 310 (Kihei Rd)	HI 380 (Kuihelani Hwy / Dairy Rd) at HI 3500 (Puunene Av)	6.42
Linking Kihei with Kahului, Route 311 is one of two expressways (Route 380 being the other) leading north-south through agricultural central Maui.
340	Kahekili Hwy	HI 3400 (Walehu Beach Road) at Kahekili Hwy (CR 3405)	transition to county maintenance north of Waihee	4.29
County Route 330 (Kahekili Highway) and State Route 3400 (Waiehu Beach Road) come together at Waiehu to form the south end of Route 340. Route 340 continues Kahekili Highway northwest 4.29 miles to become an unsigned county route en route to Honolua.
360	Hana Hwy; Keawa Pl	HI 36 (Hana Hwy) at Kaupakalua Rd (CR 365)	end of state maintenance of Hana Bay wharf	34.93
Route 360 is the renumbered stretch of Route 36 east along Hana Highway from Kaupakalua Road to Hana. The state route spurs east along an unsigned stretch to end at the wharf by Hana Beach Park.
377	Haleakala Hwy; Kekaulike Ave	HI 37 (Haleakala Hwy)	HI 37 (Haleakala Hwy) at Old Haleakala Hwy (CR 367)	9.17
A winding route along the slopes of Puu Nianiau mountain, Route 377 loops east from Route 37 (Haleakala Highway) to Route 378 (Haleakala Crater Road), from south of Waiakoa to Pukalani.
378	Haleakala Crater Rd	HI 377 (Haleakala Hwy / Kekaulike Ave)	Puu Nianiau mountain	10.15
Zigzagging east from Route 377 to Puu Nianiau mountain, Route 378 comprises the first half of the route ascending to Haleakala peak.
380	Dairy Rd; Kuihelani Hwy	HI 30 (Honoapiilani Hwy)	HI 36A (Haleakala Hwy / Keolani Pl)	6.18
Route 380 angles southwest from Kahului Airport to end at a four-lane section of Route 30. Much of the state route is an expressway.
3400	Kahului Beach Rd; Waiehu Beach Rd	HI 32 (Kaahumanu Av)	HI 340 / CR 3405 (Kahekili Hwy)	2.62
Route 3400 links Downtown Kahului with Waiehu along the former routes of Route 34 and Route 341.
3500	Puunene Ave	HI 380 (Dairy Rd / Kuihelani Hwy) at HI 311 (Mokulele Hwy)	HI 32 (Kaahumanu Av)	1.11
Puunene Avenue from Route 32 (Kaahumanu Avenue) at the Kahului central business district to Route 380 (Dairy Road) and Route 311 (Mukulele Highway) is Route 3500. The commercial boulevard was originally a part of Route 35.
Source: GIS file, DOT Road Inventory (State Routes) for the main Hawaiian Islands, State of Hawaii Dept. of Transportation, August, 2011.

Other Former State Routes

• Route 33 - Kahekili Highway - Route 33 was the designation for Kahekili Highway northwest from Wailuku to Waihee and Honokohau. The unpaved section of this route is part of County Route 340 and the paved portion was renumbered to Route 340.
• Route 34 - Lower Main St / Kahului Beach Rd - Route 34 originally comprised a loop north from Route 32 along Lower Main Street to Kahului Beach Road. The Kahului Beach Road portion was retained in the state system as the eastern half of Route 3400. Lower Main Street was turned back completely.
• Route 35 - Puunene Avenue / Mokulele Highway - Route 35 was the designation for Puunene Avenue south from central Kahului to Mokulele Highway and Kihei. This route today is part of Route 3500 north from Route 380 (Kuihelani Highway) to Route 32 (Kaahumanu Avenue) and Route 311 along Mokulele Highway.
• Route 38 - Dairy Road - Route 38 connected Route 380 / former Route 35 (Mokulele Highway) with Route 36 (Hana Highway) along Dairy Road in Kahului. Dairy Road is now a part of Route 380.
  Another portion of Route 38 followed Baldwin Avenue through Paia and Olinda Road south from Makawao. Baldwin Avenue is now County Route 390.
• Route 40 - Waiko Road - Route 40 was designated on two segments on Maui. The first was an unpaved road connecting Route 30 (Honopiilani Highway) at Waikapu with Mokuele Highway (Route 35 at the time). A portion of this road remains today as Waiko Road.
  The eastern Route 40 followed Makawao Avenue northeast from Pukalani and Route 37 to Makawao, Kokomo and Route 360 (Hana Highway), east of Ulumalu. This route was renumbered as Route 400 and later to County Route 365.
• Route 341 - Waiehu Beach Road - Route 341 was the designation for Waiehu Beach Road leading north from Kahului Beach Road / Lower Main Street (former Route 34) to Kahekili Highway (old Route 33 / current Route 340). Waiehu Beach Road is now a part of Route 3400.

Historical state route information provided by the 1970 Hawaii State Official Transportation Map and Larry Epstein.