Complex sentence: Philbin's BMW crashed into another anonymous citizen's Saab when she was driving down Wilshire Boulevard in Los Angeles in heavy traffic in September 2005 and, passing the remnants of an accident, drove into the Saab in front of her.
Split into simpler sentences: Philbin's BMW crashed into an anonymous citizen's Saab when she was driving down Wilshire Boulevard in Los Angeles in heavy traffic in September 2005. While passing the remnants of a previous accident, she drove into the Saab in front of her.