Constructed in 1937 , with additions in 1959 , the bridge spans the United States-Canada border in the middle of the Thousand Islands region , from which it derives its name .
The south end of the bridge connects with Interstate 81 , am interstate .
The south end of the bridge connects with Interstate 81 , am interstate .
简化这段文字: Constructed in 1937 , with additions in 1959 , the bridge spans the United States-Canada border in the middle of the Thousand Islands region , from which it derives its name . 输出: