{| The South Lake Union Streetcar is a streetcar line connecting the South Lake Union neighborhood to Downtown Seattle, USA. Construction on the line began in summer 2006, with service beginning at 12:12 PM PST on December 12, 2007. The line was originally envisioned by Microsoft co-founder Paul Allen to help improve the South Lake Union neighborhood that his venture capital company, Vulcan Inc., is heavily invested in. Allen's main supporter from the beginning was Seattle Mayor Greg Nickels, but he was not universally supported by the Seattle City Council, which was concerned about the lack of public support for the line and questioned if it should be moved ahead of Seattle's other transportation needs. After heavy lobbying by South Lake Union businesses, including Vulcan, the Seattle City Council agreed to develop the neighborhood into a biotechnology and bio-medical research center. Included in that plan was fundin