This bulletin provides guidelines for working safely on or around traditional camera cars (insert cars) and process trailers. A traditional camera car is a self-propelled vehicle that is specifically engineered for mounting and operating cameras and other equipment to film from a moving or stationary vehicle. A process trailer is a platform towed by a camera car and designed to carry what’s required for the shot (e.g., crew and performers, equipment, or another vehicle). When camera cars and process trailers are used together, they’re commonly referred to as camera car units.