A traffic collision was reported at 3:24 p.m. Aug. 18, 2026, on the Jefferson Street on-ramp to westbound State Route 78 in Oceanside. The California Highway Patrol classified the incident as involving unknown injuries.
The crash location was described as the Jefferson on-ramp connecting to westbound SR-78. CHP dispatch information did not provide descriptions of the vehicles involved or indicate how many vehicles were part of the collision.
No ambulance, fire response, lane blockage, overturned vehicle or vehicle fire was listed in the available dispatch details. The report also did not specify whether anyone was transported for medical treatment.
At 3:57 p.m., the freeway service patrol reported that it had closed its incident. CHP provided no additional details about the collision after that update.
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