The branch fell at about 7:19 a.m. on northbound I-680 just south of Stone Valley Road, blocking the No. 4 lane.
Nobody was hurt by the branch, but the CHP issued a Sig-alert at 9:08 a.m. so crews could remove it from the roadway.
Lanes were all clear by 9:32 a.m. and the Sig-alert was canceled.
