CHP spokesman Officer Tom Maguire said the incident occurred shortly after 8 a.m., Saturday, Dec. 13, at the intersection of Danville Boulevard and Stone Valley Road.
Deputy Jennifer Yen, 32, was driving southbound on Danville Boulevard when she collided with a westbound auto driven by 57-year-old Patricia Gagliotti of Concord, according to reports.
Maguire said both drivers were wearing seatbelts at the time of the crash and so did not receive serious injuries. Emergency crews transported both women to John Muir Medical Center where they were treated.
Officers on the scene received conflicting reports as to which direction of traffic had the green light, so no charges have been filed while officers investigate the accident.