SAN RAMON (CBS SF) — CHP officials said a heavily traveled road in San Ramon is open again Sunday evening following a crash that killed a big-rig driver when the big-rig went off a highway and into a tree.

As of 5 p.m. San Ramon Valley Boulevard between Alcosta Boulevardand Pine Valley Road was open.

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Someone called the CHP at about 7 a.m. to tell them that a big-rig went off southbound Interstate Highway 680 just north of Alcosta Boulevard and clipped a vehicle on the right shoulder of the highway.

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CHP spokesman Officer Tyler Hahn said the truck continued through a fence and into a tree.

The occupants of the vehicle clipped by the big-rig were unhurt.

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CHP officials said San Ramon Valley Boulevard between Alcosta Boulevard and Pine Valley Road was closed because the truck came to a stop on San Ramon Valley Boulevard.