Nearly 480, 000 people (40% of residents) commute by bike each day, causing some to call Copenhagen the number one cycling city in the world.

BBC: What Copenhagen can teach the world

"The more we can encourage people to leave their cars at home and commute on foot or on a bike or on transit, the more it makes the street safe for everybody, " Mr. McClure said.

WSJ: New PAC to Back Pedestrians, Bikes

Arena will frequently use the adjacent bike path, not only for her commute but for home visits, too.

CNN: 'Ideal' doctors stress quality of over quantity