Major kinds of public transport in Hong Kong include franchised buses, subway and public light buses, altogether accounting for over 88 percent of all passenger journeys by public transport in Hong Kong. Rail includes the major MTR lines operating mainly in the central area, which was connected to other railways such as west rail and east rail serving other districts in the New Territories. All railways accounted for the highest number of average daily passenger journeys on public transport, while franchised buses own the largest size of fleet among all modes of public transport. Kowloon Motor Bus Co. (1933) Ltd. (KMB) served most of the city and is the biggest operator for franchised buses in Hong Kong, with around five times the passenger carrying capacity of the second place holder, Citybus. Regarding public light buses, there were only two types, namely the red minibus (RMB) and the green minibus (GMB). GMB served more areas than RMB and therefore has a much bigger fleet and passenger carrying capacity.
However, the system is not perfect. Since 2009, number of complaints and suggestions received by the Transport Complaints Unit (TCU) has doubled in the last decade, partially related to the protest triggered by the anti-extradition law amendment bill in early 2019. In the second quarter of 2019, taxi service was the most investigated type of public transport due to complaints filed, followed closely by KMB. Most of the complaints filed against taxis concerned refused hire, and drivers' conduct and performance. Both KMB and GMB received over 150 complaints for improper driving behaviour in a quarter, as well as over 300 on staff and driver performance in the same quarter for the frequency or carrying capacity, while number of complaints are relatively lower for routing, length of operation hours , provision of stops and cleanliness.