The commission shall procure information and make recommendations to the council and shall cooperate with the park board and all similar organizations as to all facts bearing upon the needs of the city with regard to recreation grounds, the development and improvement of parks and boulevards, the extension and opening of streets and avenues, and other public ways and places, and city plans and improvements generally. The commission shall keep itself informed with reference to the progress of city planning in this and other areas and shall make studies and recommendations for improvement of the plan of the city with a view to the present and future movement of traffic, the convenience, health, recreation, safety, general welfare, and the needs of the city dependent upon such plans; it shall consider and report to the council with reference to all facts bearing upon the design and the relation to the city plan of all new public ways, lands, buildings, bridges, extensions, or openings of streets and avenues.