WOODSIDE (CBS SF) — A fatal accident that killed a Freeway Service Patrol driver on southbound I-280 in Woodside has shut down lanes for hours Tuesday, according to the California Highway Patrol.

CHP received a call regarding the accident at approximately 3:40 p.m. Tuesday afternoon on I-280 north of Farm Hill Boulevard in Woodside.

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The CHP Redwood City office confirmed that a member of the Freeway Service Patrol was assisting a driver on southbound I-280 when a lumber truck hit the Freeway Service Patrol driver and his vehicle, killing the driver.

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The lumber truck driver stayed on the scene of the accident. Authorities said it does not appear that the driver of the lumber truck was impaired by a substance such as alcohol.

FSP drivers help motorists during commute hours by providing gas, for example, to motorists who run out. Services are paid for by the state of California.

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The right lanes remain blocked as CHP officers continue their investigation into the collision. Motorists are advised to expect delays and to use alternate routes to avoid the area. Lanes reopened some time after 9:15 p.m.