Why?

Because you are in Portland

To be fair the correct answer is…

As many as 20,000 people a day visit Oregon Health & Science University’s main campus on Marquam Hill. OHSU is  Portland’s largest employer, medical destination, and home of several medical schools. Marquam Hill is also home to a residential neighborhood, nature trails, and hospitals owned by Shriners and Veterans Affairs. However, from downtown Portland, Marquam Hill is accessible by just two 2-lane roads. To keep Marquam Hill accessible, an ambitious solution was needed. After reviewing a few different options, the City and stakeholders determined a tram was the best possible solution.