Yogyakarta, one of the most popular cities in Indonesia, has various nicknames including being referred to as a student city, cultural city, and tourism city. This resulted in the city filled with newcomers either to just travel or settle some time to study and work. The influx of new arrivals led to an increase in population and in the volume of private vehicles in the city. This also caused high congestion and the occurrence of exhaust emissions. To lessen those problems, DIY Regional Government made mass transportation (e.g., Trans Jogja) to fulfill the public transportation needs.