LAFAYETTE (CBS SF) — A female pedestrian was struck and killed by a vehicle on eastbound state Highway 24 in Lafayette late Thursday morning, according to the California Highway Patrol.

The collision was reported at 11:05 a.m. on eastbound Highway 24 near the on-ramp from Pleasant Hill Road.

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A white Ford E-150 van hit the pedestrian in one of the right lanes of the highway and she was pronounced dead at the scene, CHP Officer Brandon Correia said. She has not yet been identified.

The van’s driver was uninjured and cooperated with investigators, Correia said.

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The collision prompted the closure of the three right lanes of the highway for nearly two hours. The lanes reopened by 1 p.m., Correia said.

Anyone who witnessed the collision or has information about it is encouraged to call the CHP’s Contra Costa office at (925) 646-4980.

The accident was just one of several problems on Bay Area freeways Wednesday morning that made for a nightmare commute. A standoff with an armed suspect on I-80 shut down the freeway in Emeryville for hours. The incident ended with an officer-involved shooting, but the condition of the suspect was not known.

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Earlier, a truck  careened off eastbound Highway 80 in Berkeley, shutting down two lanes and backing morning commute traffic up into downtown Oakland. There was also a crash involving two AC Transit buses in San Francisco that shut down freeway offramps at Fremont and Folsom.