The eastbound lanes of Moanalua Freeway near the Tripler exit have reopened after crews cleared four boulders from the road.
Police closed three of the lanes east of the Tripler/Puuloa exit just before 7 p.m. on Thursday, but then opened up one of the lanes after workers moved the boulders off to the shoulder.
All lanes were open by 8:07 p.m.
A police officer estimated the rocks were 2-by-3 feet.
Police said a vehicle in the second lane from the right hit one of the rocks, causing the air bag to deploy. A woman in the car was treated at the scene.