**FILE** Zipcar Chairman and CEO Scott Griffith stands April 14, 2011, with a Zipcar Mini-Cooper before the opening bell at the NASDAQ Market Site in New York. (Associated Press/Zipcar.com, Craig Ruttle)

Photo by: Craig Ruttle

**FILE** Zipcar Chairman and CEO Scott Griffith stands April 14, 2011, with a Zipcar Mini-Cooper before the opening bell at the NASDAQ Market Site in New York. (Associated Press/Zipcar.com, Craig Ruttle)