This report marks the first definitive milestone of progress toward a comprehensive plan for Los Angeles County. It is a demonstration of regional planning in practice, the foundation of which is formed by an effective Commission; proper direction of the work; sound engineering principles, adequate research and statistics; a comprehensive highway plan; a wholesome regulation of land subdivision; regulation of use of property based on comprehensive zoning; recognition of the problems of landscape design; informational material properly prepared--brief, concise, and with emphasis on visual persuasion; above all, the molding of public opinion for a comprehensive plan, well prepared and possible of accomplishment.