The revamped Transbay Transit Center in downtown San Francisco broke ground earlier this week, a project that will introduce a 1.5 million square foot development that will be part transportation hub, part public park and urban space, and part offices and retail establishments. The massive undertaking, designed by renowned architecture firm Pelli Clarke Pelli will bring together 11 systems of local and national transportation, serving 45 million people per year. In addition to securing access to myriad transit lines, the project will also provide downtown San Francisco with a 5.4acre rooftop park, designed by PWP Landscape Architecture, along with numerous cultural programs. The project is budgeted at 4.2 billion dollars and is projected for completion in 2017. It is funded in part by the construction of a 1,070foot tower that is adjacent to the Transbay Transity Center. It is also designed by Pelli Clarke Pelli and is slated to be the tallest tower in San Francisco. The tower will secure 60 stories of office space and jobs and will contribute to the projected $87 billion of revenue through 2030.