Final answer:
Symbol 48 on a Truckers form indicates trailer interchange coverage under a motor carrier's insurance policy, covering physical damage for non-owned trailers under a written agreement.
Step-by-step explanation:
When Symbol 48 is indicated on a Truckers form, it refers to trailer interchange coverage under a trucker's or motor carrier's insurance policy. This symbol specifically provides physical damage insurance coverage for a non-owned trailer that a motor carrier has possession of under a written trailer interchange agreement. The agreement typically outlines the responsibilities of both parties in terms of maintenance, loss, or damage of the equipment. It's important for truckers or those in the trucking industry to understand the implications of this symbol on their insurance forms to ensure they have the appropriate coverage for the trailers they interchange.