It was unclear when the freeway would be reopened.

Vehicles are being routed off the freeway at the Vineyard off-ramp but can get back on at the School Street or Vineyard Palama on-ramps.

A 17-year-old boy who drove a beige 1993 Ford Explorer was in critical condition following the crash and taken to the Queen's Medical Center, said police Capt. Evan Ching of the Traffic Division.

The accident involved two vehicles, and police said the Explorer appears to have lost control and veered off the School Street off-ramp, plunging about 20 feet back onto the freeway.

A male passenger, 21, was taken to Kuakini Medical Center in stable condition.

The 28-year-old female driver of a blue Lincoln Aviator was taken to Kuakini in stable condition, Ching said. A male passenger, 28, was not hospitalized.

Ching said the Explorer appears to have been heading westbound and gotten off at the School Street off-ramp. It appears to then have veered left and crashed back onto the freeway. The scene showed a guardraIl torn off and a chain link fence ripped through where the Explorer appears to have gone through.

After hitting the freeway, it was struck by the Aviator.

The Explorer was on its roof when police arrived and one of its passengers was pinned under it. It is not clear if the Explorer landed on its roof or if it flipped over after impact with the

Aviator, Ching said.

The road was slipper at the time of the 2:27 a.m. accident.