Answer the following question: The Variobahn is an articulated low-floor tram designed by Stadler Rail. Six vehicles are being supplied to London Tramlink. The first vehicles entered service during 2012. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Mean Of Transportation