From Bay City News:
All lanes are open following a big rig collision on northbound Interstate Highway 880 just south of Pleasanton in Alameda County this morning, according to the California Highway Patrol.
The big rig jackknifed on Highway 680 just north of Koopman Road shortly before midnight and a Sig-alert was issued at 12:15 a.m., according to the CHP.
All lanes of traffic were reopened by 2:30 a.m., according to the CHP.