Interstate H-3 is an intrastate interstate highway located on the island of O'ahu in the state of Hawai'i, United States. Despite the number, signage is that of an east-west highway, although most residents consider the route to run north-south. Its western terminus is at an intersection with Interstate H-1 at Halawa near Pearl Harbor. Its eastern end is at the main gate for Marine Corps Base Hawaii. This route satisfies the national defense purpose of connecting the Marine Corps base (MCBH) with the U.S. Navy port at Pearl Harbor off Interstate H-1.
Interstate H-3 viaduct in Halawa Valley
looking towards the Ko'olau crest
Table of contents |
2 Towns Along the Route 3 Intersections with other Interstates 4 Spur Routes 5 Notes |
Number of Miles
Total: 16
Towns Along the Route
Halawa, Kāne'ohe, Kailua, Marine Corps Base Hawaii.
Intersections with other Interstates
Spur Routes
NoneNotes
This road is an engineering wonder, and perhaps the most expensive (on a cost per mile basis) of any Interstate constructed. It crosses the Ko'olau mountain along a viaduct and through a long tunnel. For many years, the completion of this highway was uncertain, as it runs through culturally and environmentally sensitive areas and some park lands were used. But now, this is a beautiful freeway running through a tropical forest and over the rugged spine of windward O'ahu.
Interstate H-3 viaduct in Ha'ikū Valley