Multimodal transport refers to the door-to-door movement of goods under the responsibility of a single transport operator using multiple modes of transport. It developed with containerization in the late 1950s, facilitating growing international trade by allowing efficient transport services. Under multimodal transport, a single operator is responsible for organizing and transporting cargo across different transport links from origin to destination according to agreed schedules. International rules were developed to govern carriers' liability for loss or damage during multimodal transport operations.