Final answer:
The key advantage of a tow tractor with trailers is the efficient transport of large volumes of goods within confined areas, which optimizes productivity and reduces operational costs.
Step-by-step explanation:
The main advantage of a tow tractor with trailers is its efficiency in transporting large volumes of goods over short to medium distances, such as within industrial complexes, airports, or warehouses. Compared to conventional heavy trucks, these tractors can pull multiple trailers in a 'road train' formation, allowing them to move more cargo in a single trip. This capability improves productivity by reducing the number of trips needed and can lower operational costs, such as fuel and labor expenses.