Selecting a car carrier requires balancing load capacity, structural durability, and safety features. For long-haul transport, prioritize high-tensile steel (like Q345B) frames to ensure the trailer can handle the weight of multiple vehicles without deformation. You must also decide between open and enclosed trailers; enclosed models provide superior protection against weather and road debris for luxury vehicles, while open trailers offer higher cost-efficiency and easier loading for standard dealership deliveries.