Certified Logistics Technician (CLT) Practice Exam

An unaccompanied trailer is specifically designed for transport methods where it does not require a driver to be attached to it during its journey. This allows it to be utilized on different transport modes such as ferries and has the ability to be piggybacked on rail cars. This flexibility is a key characteristic that sets unaccompanied trailers apart from standard trailers, which typically travel with a driver and are primarily used for road transport.

In contrast, a standard trailer is generally reliant on a towing vehicle with a driver, which limits its transport options. The size of the unaccompanied trailer does not inherently distinguish it from standard trailers, as both can come in various sizes depending on the intended use. Moreover, stating that an unaccompanied trailer cannot be used for ground transport is misleading, as it is often transported via ground methods but does not require a driver during specific shipping processes. Hence, the correct choice emphasizes the unique versatility of the unaccompanied trailer in multimodal transport situations.