**FILE** Lyft passenger Christina Shatzen gets into a car driven by Nancy Tcheou in San Francisco on Jan. 4, 2013. Fed up with traditional taxis, city dwellers are tapping their smartphones to hitch rides from strangers using mobile apps that allow riders and drivers to find each other. Internet-enabled ridesharing services such as Lyft, Uber and Sidecar are expanding rapidly in San Francisco, New York and other U.S. cities, billing themselves as a high-tech, low-cost alternative to cabs. (Associated Press)
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