A new, automatically controlled transit system is being developed, manufactured, and tested. The system will transport interline, enplaning, and deplaning passengers, employees, interline baggage and mail, airmail, supplies, and trash to meet the needs of the world's largest airport. The system, known as Airtrans, will make the Dallas/Fort Worth Airport the easiest airport in the world to use. Computer simulation of the automatic control system to verify control system design and establish limits for operational testing will be discussed. The methodology used to design successful operational tests will be discussed. The material presented will apply to other systems that are similar in concept and design.