?In San Francisco, the PDR-2 (Production, Distribution, and Repair) zoning district is designed to support and protect a wide range of light and contemporary industrial activities. This zoning prohibits new residential developments, large office projects, and large-scale retail establishments to maintain the area's industrial character. Most other uses are permitted, encouraging the conservation and intensification of industrial operations. The PDR-2 district aims to preserve space for both existing and emerging industries that require flexible operating spaces and separation from residential zones.