User:KeithH/Interstate H-4

Interstate H-4 was a proposed Interstate highway in Honolulu, Hawaii that would have run along the Honolulu waterfront. In 1968, in response to a provision in the 1968 Federal Highway Act that expanded the mileage of the interstate Highway system, the Hawaii Department of Transportation proposed plans for Interstate H-4 to the Federal Highway Administration, but no action was taken on it.

Route
The route that would have been Interstate H-4 was originally conceived as the Makai Arterial that would have carried cross-town traffic along with the Mauka Arterial (which later became the Lunalilo Freeway segment of Interstate H-1). The idea was proposed in the 1940s and 1950s but was never built as a freeway due to lack of funding. Hawaii DOT proposed H-4 as a reliever route for H-1, which the department projected would experience severe overload. Other reasons cited for building H-4 were to connect East Honolulu commuters with employment centers in Mapunapuna and points west, and also to provide direct access to Waikiki from Honolulu International Airport.

The proposed route of H-4 would have been 6.5 miles, extending from H-1's Keehi Interchange in the west (unbuilt at that time) to the Kapiolani Interchange in the east (which was just completed). From the Keehi Interchange, the freeway would have run between Dillingham Boulevard and Nimitz Highway to Liliha Street, at which point it would turn southeast to meet Ala Moana Boulevard, follow Ala Moana Boulevard to Ala Moana Center, then turn inland paralleling the Ala Wai Canal before turning to meet the Kapiolani Interchange.

Interchanges were planned at Waiakamilo Road, Liliha Street, South Street, Ward Avenue, Piikoi Street, Atkinson Drive, University Avenue, and Date Street.