Process trailer

A process trailer, also known as insert trailer and low loader, is a trailer towed by a tracking vehicle for the purpose of being used as a moving camera platform.^[1] They are generally very low to the ground to give a realistic perspective of height and can be expanded in width to allow the camera to achieve a wider shot. Process trailers are most often used to shoot dialogue scenes inside cars or other vehicles while reducing risk for actors who would otherwise drive while delivering lines.

A New York City taxicab loaded onto a process trailer with lights and cameras in preparation for a filming

The trailer is composed of a wheeled platform, low to the ground, with the vehicle secured on top. The vehicle on the platform is known as a "picture car". The platform itself is then towed by another vehicle with crew members and camera equipment to film the actors in the vehicle.^[2] Although process trailers are safer for actors, there is still a significant risk to the driver and passengers of the towing vehicle - for this reason, process trailers are often led by a police vehicles to prevent traffic accidents. In Australia, process trailers must be accompanied by police and may only be used with a permit.^[3]