The demonstration of landscape performance benefits has become increasingly important in landscape architecture practice and in communicating to interdisciplinary audiences. This project introduces four built streetscape projects investigated in the 2012 Landscape Architecture Foundation Case Study Investigation (CSI) program, including a large-scale permeable pavement project in Charles City, Iowa, and American Society of Landscape Architects' award-winning projects in Missouri, California,

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... Colorado. Following the case studies, several compelling performance benefits of these projects are presented, such as safety and accessibility and water and energy conservation. The paper specifically illustrates the economic benefits and the data source used for performance assessment in two projects. The paper ends with a discussion on the lessons learned in the CSI program.