Denver Union Station is the centerpiece of the $7.8 billion public/private transit FasTracks project. The station anchors the new multi-modal hub joining downtown Denver and the region. The open-air commuter rail terminal, light rail station, and below-grade bus terminal connect transportation programs across the 42-acre redevelopment area. Strong urban design principles were applied, including use of a common architectural language for the transportation elements. The commuter Train Hall structure is a rational, cost-effective response to a series of programmatic requirements and constraints, including: weather protection to 50% of the platform, allowing diesel fumes to exhaust to the open-air, respecting the view corridor along 17th Street to protect views of the historic station, and designing a form that complements the historic Union Station building. The canopy is both functional and contemporary, and highly respective of the historic architecture, which it does not physically touch. Between the historic station and the light rail station is a 22-gate underground Bus Concourse servicing 16 regional and local bus routes. The terminal serves a dual purpose as a subterranean pedestrian concourse that connects the transportation programs across the site. The Light Rail Station’s architecture references the steel tubes and canopies of the Train Hall, but elements were elegantly resized and reinterpreted to suit the smaller, local ridership. High quality public spaces are carved out across the transit district and assembled into a continuous network. The public realm design encourages a range of character for individual spaces – from dynamic and highly programmable to quiet and neighborhood-oriented.