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Checking a people mover model at the Personal Rapid Transit (PRT) Expo '73 Friday in Currigan Hall are Marty Van Doornick, 8, of 1630 Leyden St., front, and Philip Allen, 7, of 1544 Grape St. June 9, 1973. Photo by Mel Schieltz. (WH2129-2018-1309)

Denver's 1970s Flirtation with Personal Rapid Transit

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