Motorists on westbound SR-4 notified officials of a serious injury accident at the Alhambra Avenue off ramp shortly after 9 p.m. Thursday.
Officers determined that a 2007 black Toyota Camry had been driven off the roadway and collided into heavy brush and trees at the off ramp. An adult female passenger was ejected from the Toyota and suffered major injuries. She was transported to a local hospital, according to the CHP.
The driver, a 21-year-old woman from San Pablo, was also ejected during the crash – incurring fatal injuries. She was pronounced deceased by medical personnel on scene.
It is unknown at this time if alcohol or drugs were a factor in this collision , according to the CHP. If anyone witnessed this collision or the events leading up to it and have not spoken yet with CHP, please contact Contra Costa CHP in Martinez, (925) 646-4980.
The area has seen a number of damaging and fatal crashes in recent weeks.