Combined transport and bills of lading. In modern international trade and sales of goods the transport of goods by sea alone is no longer of greatest significance. Containers, in particular, have made it easier for transport of the same unit to be carried by different modes of transport. Sales of goods and delivery of goods are now commonly made on a "door-to-door" basis. "Combined transport" is the term used where goods are successively carried by at least two modes of transport, for example, by road, rail, inland waterway, sea and air.