The Brief Five vehicles collided on the southbound 170 Freeway near Riverside Drive, leaving six people injured and causing massive traffic delays. A multi-vehicle collision involving five cars on the southbound 170 Freeway triggered a major emergency response Thursday morning, causing significant morning commute delays in Studio City. What we know:The incident occurred on the freeway near the Riverside Drive off-ramp just before 6 a.m., according to the California Highway Patrol. An investigation revealed the crash involved a blue Tesla Model Y, gray Toyota Camry, black Toyota Highlander, gray Honda Pilot, and a green Ford Explorer. Six people were evaluated at the scene, and at least three people were transported to local hospitals for treatment.