The Portland Aerial Tram is an aerial tramway in Portland, Oregon carrying commuters between the city's South Waterfront district and the main Oregon Health & Science University (OHSU) campus, located in the Marquam Hill neighborhood. It is the second commuter aerial tramway in the United States (after New York City's Roosevelt Island Tramway). The tram travels a horizontal distance of 3,300 feet (5/8 mi, 1 km) and a vertical distance of 500 feet (150 m) in a ride that lasts three minutes. The tram was jointly funded by OHSU, the City of Portland, and by South Waterfront property owners, with the bulk of the funding coming from OHSU. It is owned by the city and operated by OHSU. While the majority of passengers are affiliated with OHSU, it is open to the public and operated as part of Portland's public transportation network that includes the Portland Streetcar, MAX Light Rail, and TriMet buses. After opening in December 2006, the tram carried its one millionth passenger on October 17, 2007. The tram cost $57 million to build—a nearly fourfold increase over initial cost estimates, which was one of several sources of controversy concerning the project. A round-trip tram ticket costs $4.50; the tram is free for OHSU employees, patients, students, and visitors.