The Hospital Rock Tunnels are a small pair of highway tunnel

Tunnel

A tunnel is an underground passageway, completely enclosed except for openings for egress, commonly at each end.A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. Some tunnels are aqueducts to supply water for consumption or for hydroelectric stations or are sewers...

s passing through a ridge on the edge of the Ko‘olau Range

Koolau Range

Koolau Range is a name given to the fragmented remnant of the eastern or windward shield volcano of the Hawaiian island of Oahu. It is not a mountain range in the normal sense, because it was formed as a single mountain called Koolau Volcano...

 on the island of O‘ahu

Oahu

Oahu or Oahu , known as "The Gathering Place", is the third largest of the Hawaiian Islands and most populous of the islands in the U.S. state of Hawaii. The state capital Honolulu is located on the southeast coast...

, Hawaiʻi, USA. The tunnels are located on Interstate H-3

Interstate H-3

Interstate H-3 is an intrastate Interstate Highway located on the island of O'ahu in the state of Hawai'i in the United States. H-3 is also known as the John A. Burns Freeway...

, which connects Kaneohe with Interstate H-1

Interstate H-1

Interstate H-1 is the busiest Interstate Highway in Hawaii, United States, located on the island of O‘ahu. Despite the number, this is an east–west highway—the 'H'-series numbering reflects the order in which routes were funded and built. H-1 goes from Route 93 in Kapolei to Route 72 in...

 at Hālawa near Pearl Harbor

Pearl Harbor

Pearl Harbor, known to Hawaiians as Puuloa, is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet...

, and are 354 feet (107.9 m) long Kaneohe bound and 353 feet (107.6 m) long Halawa

Halawa, Hawaii

Halawa is a census-designated place in the ‘Ewa District of Honolulu County, Hawaii, United States. Halawa Stream branches into two valleys: North and South Halawa; North Halawa is the larger stream and fluvial feature. Their confluence is within the H-3/H-201 highways exchange. Most of Halawa...

 bound. The tunnels are "cut and cover" tunnels and have no lighting system of their own.

Also nearby are the larger Tetsuo Harano Tunnels

Tetsuo Harano Tunnels

The Tetsuo Harano Tunnels are a pair of highway tunnels passing through the Ko‘olau Range on the island of O‘ahu. The tunnels are located on Interstate H-3, which connects Kaneohe with Interstate H-1 at Hālawa near Pearl Harbor, and are long Kaneohe-bound and long Halawa-bound.The tunnels are...

.