READINGTON TWP., N.J. -

A woman died early Wednesday after police said she fell from a tractor trailer and was hit by two trucks on Interstate 78.

The accident happened around 1:30 a.m. in the eastbound lanes of I-78 near mile marker 26.3 in Readington Township, Hunterdon County.

Juana Alvarado was riding in the cab of a tractor trailer driven by her husband, Luis Alvarado, when, for unknown reasons, she fell from the passenger side of the cab, New Jersey State Police said.

Alvarado, 46, fell into the right lane of travel and was struck by another tractor trailer and a box truck that were traveling behind, police said.

She died at the scene.

The Alvarados are from the Bronx, New York.