Passenger cars and buses make up most of Hawaii's road transportation. According to official 2000 estimates, 4,301 buses, 459,515 cars, and 273,735 trucks traverse the state. The islands of Kauai, Hawaii, Oahu, and Maui have the most extensive bus service.
Cities such as Molokai, Oahu, and Honolulu are efficiently connected through a road network that includes Hawaii's freeways H1, H2, and H3. Other important intersections and hubs include Kohala Mountain Road and Route 250, Akaka Falls Road and Route 220, Route 19 and Hawaii Belt Road (with access to Hilo Harbor and Kailua Kona), and Route 240 and Honokaa Waipio Road (with access to the Waipio Valley).
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