Honolulu police reopened two lanes of the H-1 freeway at the Kunia offramp in the Waianae direction following a motor vehicle accident.
The accident happened at about 3:30 a.m.
Police dispatch said debris along the roadway slowed traffic.
Hawaii News Now reported that a truck damaged an overhead sign near the offramp.
Both the Kunia and Ewa offramps remained open.