Which of the following describes the purpose of the National Motor Freight Traffic Association?

The National Motor Freight Traffic Association (NMFTA) serves several important functions within the freight transportation industry, one of which is issuing Standard Carrier Alpha Codes (SCACs). SCACs are unique codes that are assigned to transportation carriers which help in the identification and processing of their shipments. This task is crucial in ensuring efficient communication and standardization among various shipping and logistics operations.

The other options focus on aspects that are not directly related to the core mission of the NMFTA. Regulating air freight costs pertains more to aviation authorities than to the NMFTA, and while the organization may be involved in broader safety discussions, it does not specifically publish safety regulations. Additionally, developing logistics software solutions is outside the scope of NMFTA's primary responsibilities, which centers more on freight classification, rate-related services, and standardization.