Denver International Airport Automated Guideway Transit System and about 5,000 passengers were affected by the failure. The day of the failure is now referred to as "Black Sunday" by airport personnel. Denver International Airport Automated Guideway Transit System The Denver International Airport Automated Guideway Transit System is a people mover system operating at Denver International Airport in Denver, Colorado. The system opened along with the airport itself in 1995, and was conceived as a means to connect all of the midfield concourses with the south terminal and quickly transport passengers between them because of the longer distances between each building, especially when compared to Stapleton International Airport,
Pittsburgh International Airport from the rest of the airport. While US Airways made immense cuts in service during the early 21st century, other carriers began to play a more dominant role at PIT. The airport's operator, the Allegheny County Airport Authority, has attempted to attract new service to the airport, particularly low-cost and international carriers. AirTran Airways, which had trouble competing in Pittsburgh after beginning service in 2000, was able to expand Pittsburgh offerings after the US Airways cuts. In 2003, USA3000 Airlines began service to Florida and subsequently expanded to include international destinations in the Caribbean. Southwest Airlines began service to Pittsburgh