Big Rig Overturns, I-680 SigAlert Issued

A big rig trailer overturned on northbound Interstate 680 near Andrade Road in Sunol on Wednesday afternoon, blocking two lanes and triggering a SigAlert. (msn.com) California Highway Patrol said the crash was reported at 3:14 p.m. on April 22. The overturned trailer also struck a Toyota RAV4 and pushed it onto the freeway shoulder. (msn.com) CHP Dublin issued the SigAlert at 3:37 p.m. and said there was no estimated time to reopen the blocked lanes while crews worked the scene. (msn.com) (patch.com) The wreck backed up traffic heavily between Sunol and Fremont, a stretch that carries commuters between the Tri-Valley, southern Alameda County and Silicon Valley. (msn.com) Sunol is a choke point for Bay Area drivers because Interstate 680 and State Route 84 meet there, and crashes near Andrade Road can snarl both regional and local traffic. (commutedash.com) (chp.ca.gov) The crash followed another major truck overturn in the same Sunol corridor on April 3, 2025, when a dump truck spilled dirt across both sides of I-680 and shut lanes for hours. (patch.com) (cbsnews.com) For drivers on Wednesday, the immediate issue was simpler: two blocked northbound lanes, no reopening estimate, and a backup that stretched well beyond Sunol. (msn.com)