サンフランシスコ市営鉄道
A technical feasibility study, under the aegis of the National Park Service and San Francisco Municipal Railway, was completed in December 2004. An Environmental Impact Statement for the extension, involving the San Francisco Municipal Railway, National Park Service and Federal Transit Administration, commenced in May 2006. The Draft Environmental Impact Statement (DEIS) was completed in March 2011, and was scheduled to be reviewed by December 2011.