A car overturned on eastbound Highway 580 before Grant Line Road this morning just before 5:00 a.m.
According to 511.org, the two left lanes of I580 were blocked and traffic leaving Tri-Valley was slowed. The California Highway Patrol has not yet been reached for comment on the collision.
According to the CHP website, a Sig Alert was issued for the the area. A tow truck and fire crews responded to the scene.
The lanes have since reopened, according to the CHP webiste.
Check Patch for updates on this collision.
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