A traffic collision was reported on westbound State Route 4 near the Sand Creek Road off-ramp on Aug. 19, 2026, at approximately 1:39 p.m. The location was described as just east of Sand Creek Road in the Contra Costa area.
The California Highway Patrol classified the incident as a traffic collision with an ambulance en route. The dispatch information did not specify the number or types of vehicles involved.
The collision was reported in the westbound lanes near the off-ramp. CHP dispatch records did not identify a lane closure, overturned vehicle, fire, or other roadway obstruction.
A later CHP update at about 3:59 p.m. indicated that the responding resource was pulling into the designated location. The available dispatch information did not provide additional details about injuries or the circumstances of the collision.
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