Definition: Tonne-kilometre (tkm)
Unit of measurement of goods transport which represents the transport of one tonne of goods over a distance of one kilometre.
(Fourth version of the Transport Glossary)
Unit of measure representing the movement of one tonne of cargo in a merchant ship over one kilometre.
(Third version of the Transport Glossary)
International Transport Forum, Eurostat, United Nations Economic Commission for Europe (UNECE), "Illustrated Glossary for Transport Statistics", 4th Edition, Luxembourg 2009