Process trailer

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

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. 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.

In Australia, process trailers must be accompanied by police and may only be used with a permit.