a study conducted in 1955 by the State Highway Commission of Wisconsin in cooperation with the City of Waukesha and the U.S. Department of Commerce, Bureau of Public Roads
conducted in 1960 by the State Highway Commission of Wisconsin, Planning and Research Division, Inventory-Transportation Unit ; in cooperation with the City of Green Bay ; and the U.S. Department of Commerce, Bureau of Public Roads
a study conducted jointly by the State Highway Commission of Wisconsin and the City of Racine in cooperation with the Bureau of Public Roads, U.S. Department of Commerce