SAN FRANCISCO, CA - JANUARY 21: A Lyft car sits at a stoplight on January 21, 2014 in San Francisco, California. As ridesharing services like Lyft, Uber and Sidecar become more popular, the San Francisco Cab Driver Association is reporting that nearly one third of San Francisco's licensed taxi drivers have stopped driving taxis and have started to drive for the ridesharing services. (Photo by Justin Sullivan/Getty Images)
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Getty Images News Justin Sullivan