DOWNEY (CBSLA.com)   — A 31-year-old woman was killed when she stepped into traffic lanes on a busy highway and struck by a sedan north of Downey.

The CHP said the woman, a resident of Los Angeles, was walking north in the center median of Rosemead Boulevard near Gallatin Road when she stepped into the number one lane about 11:05 p.m. Friday.

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The victim was hit by a 1997 Acura driven by a 46-year-old resident of San Gabriel. He was not cited or arrested.

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It was unclear why the woman was walking on the highway.

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She woman was pronounced dead at the scene.

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