This story is part of a series on commuting in America.
Imagine a hospital on top of a mountain. How would doctors and patients get in and out? In Portland, Ore., commuters don't have to drive up a twisty, two-lane road to get there. Instead, they glide up 500 feet in the air in a gleaming silver gondola.
Portland's aerial tram connects the south waterfront down near the river to the Oregon Health and Science University on top of Marquam Hill.
For nurse Sara Hone, it has changed her commute. "I love it. I can't imagine a time without it," she says.