Detroit-Windsor Tunnel opens to traffic - Nov 03, 1930 - HISTORY.com

At 12:05 A.M. on this day in 1930, the Detroit-Windsor Tunnel between the United States and Canada is officially opened to car traffic. As Windsor Mayor Frederick Jackson had bragged at the tunnel’s elaborate dedication ceremony two days before, the structure–the only international subaqueous tunnel in the world–made it possible to “pass from one great country to the other in the short space of three minutes.” (For his part, Detroit Mayor Frank Murphy cheered that the project signified “a new appreciation of our desire to preserve peace, friendship, and the brotherhood of man.”) The first passenger car through the tunnel was a 1929 Studebaker.