Sue Lempert has dedicated many years to public service as a member of the San Mateo City Council, the Metropolitan Transportation Commission, and other public agencies where she has supported policies consistent with the triple bottom-line of sustainability. Lempert initiated the Rail Corridor Plan to encourage mixed-use, transit-oriented development. She is an advocate for more bicycle and pedestrian paths and worked for the creation of Shoreline Park. Lempert has encouraged developers to include 15% affordable housing units in new developments. She has pushed for future City of San Mateo buildings to meet “green building” standards and is currently working to develop the San Mateo City Sustainable Development Policy.