Taoyuan International Airport connected by two, short people movers. The third and fourth terminals are planned, and the Taoyuan Airport MRT links the terminals together underground, and provides transportation to Taipei City. Terminal 1 is the original passenger terminal of the Taiwan Taoyuan International Airport. The building was designed by Chinese-born, Taiwanese-American structural engineer Tung-Yen Lin and is based on the main terminal of Washington Dulles International Airport. The five-storey, terminal, along with the airport, opened in 1979 to relieve the overcrowded Taipei Songshan Airport. All international flights were moved to the airport following the completion of this terminal. Terminal 1 featured 22
Washington Dulles International Airport mezzanine with more room for lines. A new train system, dubbed AeroTrain and developed by Mitsubishi, began in 2010 to transport passengers between the concourses and the main terminal. The system, which uses rubber tires and travels along a fixed underground guideway, is similar to the people mover systems at Singapore Changi Airport, Hartsfield–Jackson Atlanta International Airport, and Denver International Airport. The train is intended to replace the mobile lounges, which many passengers found crowded and inconvenient. The initial phase includes the main terminal station, a permanent Concourse A station, a permanent Concourse B station, a permanent midfield concourse station