UPDATE: 7:30 a.m.
All lanes of the H-1 eastbound in Kaimuki have been reopened after tow wagons cleared the scene.
A motor vehicle collision has forced the closure of all westbound lanes of the H-1 eastbound by the 5th Avenue onramp this morning.
A tow wagon is on the scene, according to the Honolulu Police Department. Motorists are advised to expect delays.
No serious injuries were immediately reported.