Storm-water runoff from the roof-top park, as well as water from the sinks in the terminal building, is collected and polished in a subsurface constructed wetland at the east end of the park. ![]() ![]() The park actively improves the environment by absorbing carbon dioxide from bus exhaust, it treats and recycles water, and creates a locus in downtown San Francisco for birds, butterflies, and other pollinators. PWP workjed closely with environmental artist Ned Kahn on a 1,200-foot-long Bus Jet Fountain-a feature in which buses moving through the terminal trigger jets of water in the park above. In order to create a topography that blurs the distinction between roof and ground, the park integrates mounded vegetated hills with domed architectural skylights that allow daylight into the terminal below. The park design is composed of curving paths that lead visitors through different experiential settings, both contemplative and social. It is integrally designed with the building in order to achieve expansive areas of soil to support large, healthy trees and shrubs, and to seamlessly tie into the architectural sustainability programs. The park was conceived of as a multifunctional space providing respite, activity, and education for transit users and local residents alike. The park serves as an essential element in the growth of the new neighborhood and provides high-quality open space in an area that lacks significant land for park development. The Salesforce Transit Center, a bus and high speed rail station, is capped at the roof with an iconic 5.4 acre park, designed as both a public destination and community park within downtown San Francisco.
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