Q:The USRA 2-8-8-2 was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration the nationalized railroad system in the United States during World War I. These locomotives were of 2-8-8-2 wheel arrangement in the Whyte notation or (1'D)'D1' in UIC classification. A total of 106 locomotives were built to this plan for the USRA; postwar it became a de facto standard design. 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?
A:
Mean Of Transportation