A woman who walked onto traffic on the H-2 freeway in the Waipio area Saturday morning has died after a hit-and-run with a car.

The fatal collision took place at around 4:15 a.m. on the freeway prior to Ka Uka Boulevard, the Honolulu Police Department reported.

It was reported to HPD that the woman had been walking southbound alongside the H-2 freeway when she stepped onto the traffic lanes. An unknown driver who was also traveling southbound on the freeway collided with the pedestrian and continued driving, fleeing the scene.

The woman was pronounced dead at the scene in what has become the 27th traffic fatality on Oahu this year. Her identity has not been released.

The driver was possibly driving a dark-colored, late-model Honda sedan with damages to the front headlight and driver’s side-view mirror, HPD said.

It’s unclear if speed, drugs or alcohol contributed to the collision.

There were 28 traffic fatalities on Oahu at the same time last year.

Anyone with information about the collision is asked to contact HPD’s Traffic Division at 808-723-3413.