Interstate H-1

Interstate H-1
Interstate H-1
	H-1 highlighted in red
Route information
	Maintained by HDOT
Length	27.16 mi (43.71 km)
Existed	1960–present
History	Completed in 1986
NHS	Entire route
Major junctions
West end	Route 93 in Kapolei
	H-2 in Waipahu; H-3 / H-201 in Aiea;
East end	Route 72 in Honolulu
Location
Country	United States
State	Hawaii
Counties	Honolulu
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Routes in Hawaii;

Interstate H-1 (H-1) is the longest (27.16 miles = 43.71km) and busiest Interstate Highway in the US state of Hawaii. The highway is located on the island of Oʻahu. Despite the number, this is an east–west highway; the 'H'-series (for Hawaii) numbering reflects the order in which routes were funded and built. H-1 goes from Route 93 (Farrington Highway) in Kapolei to Route 72 (Kalanianaole Highway) in Kāhala. East of Middle Street in Honolulu (exit 19A), H-1 is also known as the Lunalilo Freeway, after the former Hawaiian king, and is sometimes signed as such at older signs in central Honolulu. West of Middle Street, H-1 is also known as the Queen Liliʻuokalani Freeway, after the former Hawaiian queen; this name is shown on some roadmaps. It is both the southernmost and westernmost signed Interstate Highway located in the US.

^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved January 22, 2023.

[1] Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved January 22, 2023.

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