Hospital Rock Tunnels

The Hospital Rock Tunnels are a small pair of highway tunnels passing through a ridge on the edge of the Ko‘olau Range on the island of O‘ahu, Hawaiʻi, USA. The tunnels are located on Interstate H-3, which connects Kaneohe with Interstate H-1 at Hālawa near Pearl Harbor, and are 354 feet (108 m) long Kaneohe bound and 353 feet (108 m) long Halawa bound. The tunnels are "cut and cover" tunnels.^[1]

H-3 westbound approaching the tunnels

Hospital Rock Tunnels

Hospital Rock Tunnels in the foreground, to the left. The larger Tetsuo Harano Tunnels are seen entering the range in the background.
Overview
Official name	memorial rock
Location	near Kaneohe, Hawaii
Coordinates	21.401816°N 157.81505°W / 21.401816; -157.81505
Route	H-3
Technical
Length	354 feet (108 m) Kaneohe bound 353 feet (108 m) Halawa bound
No. of lanes	4

Also nearby are the larger Tetsuo Harano Tunnels.

References

1. Sanders, Craig. "H3: The Island Interstate". Federal Highway Administration. Retrieved 14 September 2020.