The plaintiff, a 48-year-old woman named Marcia Arreola, was stopped at a traffic light in Cerritos on Dec. 23, 2014. She was stopped at a light on Artesia Blvd. at its intersection with Norwalk Blvd. facing westbound. Defendant Susan Hanson was traveling eastbound on Artesia, and defendant John Austin Deapera Ella was heading north on Norwalk. The two defendants collided in the intersection, causing both vehicles to careen into Arreola’s vehicle.