A 19-year-old Mililani woman died when she crashed a 2008 Chevy Malibu sedan down a ravine off Kamehameha Highway and was ejected from the car.

The accident happened near Waikalani Drive in Mililani at about 6:45 a.m.

Police said the woman was speeding, town-bound on Kamehameha Highway, when she lost control of the car, went off the road and down a ravine.

Police said she was pronounced dead at the scene.

She was the only occupant of the car.

It’s not known if alcohol was involved.

Her death is the 29th fatality on Oahu roads so far this year, compared to 23 at the same time last year.

Police closed the town-bound lanes of Kamehameha Highway for about three hours while they investigated the crash.