Landscape Architect & Specifier News

JAN 2017

LASN is a photographically oriented, professional journal featuring topics of concern and state-of-the-art projects designed or influenced by registered Landscape Architects.

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60 Landscape Architect and Specifier News Hacienda Avenue, in Campbell, Calif., was in desperate need of a transformation. Like many suburban residential streets, it had been designed for maximum efficiency in moving cars without much consideration for any other modes of circulation. Although this one-mile stretch of roadway only had a single lane of traffic in either direction, the right of way was a staggering 90 feet wide. Beyond that the street was littered with potholes, lacked pedestrian and bicycle facilities, provided only minimal access to bus routes, had inconsistent lighting, and storm drainage issues. The city identified Hacienda Avenue as an opportunity to create a new model for residential street design that would equally prioritize all modes of transportation, create a safer pedestrian environment, achieve sustainability goals, and would be beautiful to boot. Achieving these lofty goals was no easy task, and city planners embarked on multi-phase work with landscape architects Callander Associates. The phases included conceptual design and visioning efforts, grant applications to fund further design and outreach efforts, and construction documentation and implementation. Given the sheer size and ambition of the project, this was going to be high profile from day one. Extensive community outreach was conducted to solicit community input and keep residents informed. Techniques included community meetings, school presentations and traditional mailings as well as Facebook and project updates on the city's website. The resulting project is a testament to the efforts of the community and to the benefits of incorporating sustainabile design goals early in the process. The final design reduces the width of the travel lanes, provides consistent bike lanes, and retains the existing sidewalks. The roadway was lowered to improve drainage patterns, and the pavement reconstruction used full depth pavement reclamation (FDR). Rather than excavating and replacing the roadbed material, FDR repurposes the original material into substrate for the new asphalt surface by adding add mixture to the original material. Full depth pavement reclamation offers an upfront savings of 30 to 50 percent as well Above: In reducing the size of the vehicular travel lanes, the roadway was lowered to improve drainage. Additionally, the pavement was reconstructed using a method called full depth pavement reclamation, in which the original material is repurposed into new substrate for the asphalt surface. By recycling the already in-place material, the process is environmentally friendly and saves cost upfront as well as cost of maintenance. The construction time is also decreased, resulting in less disruption for residents and road users.

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