The crash was reported at 5:27 a.m., and two lanes were blocked at that time.
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The crash involved a Safeway big-rig and a Honda, the CHP said. About 40 gallons of oil gushed out of the truck down an embankment, according to the CHP.
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The Sig-alert issued at 5:49 a.m. is still in effect, the CHP said.