c. 1935; "The Detroit and Canada Tunnel, connecting Detroit and Windsor, Ontario, is the first vehicular subway ever built between the two nations. It is approximately a mile long from portal to portal. The American portal is but a few hundred feet from the center of the financial and shopping districts of Detroit, while the Canadian end is located in the very heart of Windsor's rapidly expanding business center."; "Photo courtesy of Holden, McKinney & Clark."