A 52-year-old man was critically injured in a traffic collision near McNair Gate at Schofield Barracks.
The incident was reported at 12:23 p.m.
Police closed Wilikina Drive in both directions for an investigation. The road was reopened about 3:30 p.m.
Police indicated that the collision may have resulted from one of the parties suffering a medical emergency.
No other injuries were reported.