TRACY, Calif. – First responders were busy in San Joaquin County, Calif. on Friday morning thanks to a pair of big rigs. At approximately 5:30 a.m., South San Joaquin County Fire Authority responded to a report of a vehicle accident involving two big rigs, with one of them being fully involved. No injuries have been reported. The location of the accident was in Tracy near Patterson Pass Road according to media reports in the area.