A dump truck with its trailer bed raised hit the Waiawa overpass on Oahu's H-1 freeway, shutting eastbound lanes for hours in a costly but injury-free crash.

• The raised trailer struck the bridge just after 1 p.m., scattering debris across the freeway.
• No one was hurt, and the overpass came away with only minor damage.
• Eastbound traffic was snarled for hours, turning the afternoon commute into gridlock.
• State transportation officials say the crash was avoidable — drivers are supposed to know their clearance and walk around the truck before rolling.
• The wreck lands just after Hawaii lowered the minimum age for a commercial driver's license to 18, and lawmakers now want the footage used in training schools.

Outlook: Expect pressure on the trucking company for an explanation and a push to fold pre-trip checks harder into commercial driver training.