BBC World Service
The gyroscope-balanced C-1 two-wheeler, made by San Francisco startup Lit Motors, is purposefully small and designed to change the rules of the road in cites.
International air travel to and from the U.S. has more than doubled in the last 20 years to 152 million trips in 2011 according to a new report from the Bookings Institution.
The majority of Americans still drive alone in a car to and from work. But in cities and states across the nation, the commuter population is turning to carpools, public transportation, walking, and bikes.