The streets and car-parking of San Francisco represent about 25% of the area of the city, much more than all the parks united. A collaborative initiative between mayor, department of public works and the municipal transportation Agency calls for projects
in order to give back to people temporarily  unused space. The Pavement to Parks initiative is a pedestrian-friendly, that installs tables and chairs, plants, on parking places. If the experience is compelling, the city will give back permanently these areas to pedestrians.