NADA recognizes that medium and heavy duty truck dealers have specific needs and encounter unique issues that are not always addressed by NADA programs and publications. Therefore, in 1970, the American Truck Dealers (ATD) division of NADA was established to provide programs and services to this highly specialized segment of its membership. Today, ATD represents more than 2,000 franchised medium and heavy duty truck dealers holding nearly 3,000 separate franchises, domestic and import.