The Institute of Transport Economics (Norwegian: Transportøkonomisk institutt, TØI) is a research institution working within the field of transport economics, predominantly applied research in Norway. It was founded as a government agency in 1958, and since 1964 as a subsidiary of the Royal Norwegian Council for Scientific and Industrial Research. Since 1986 it has been a private foundation. Funding is provided through the Research Council of Norway (30%) and public authorities ordering reports. The institute is based at Blindern in Oslo, Norway.