It helps carriers maintain an asset light model and operate primarily on routes where they have sufficient numbers and make significant profits. On less profitable routes, carriers use subhauler to transport goods. Subhaulers have the advantage of obtaining orders from several transport and transport companies and consolidating all these items together and making profits on lines that are generally less profitable. It is an owner operator who transports freight for a main carrier. A porthauler is a subhauler that collects cargo from the port and transports it to the operating terminal or consignee. In addition, there is very little competition on these lines and all transport companies use the services of a single subhauler. Sometimes Subhauler also rents trucks from the transport or transport company. .