Lantau Island
The numbering systems of public buses can be classified into "Hong Kong Island routes", "Kowloon and New Territories routes", "Lantau Island (New Lantao Bus) routes", "MTR Bus routes", "Cross harbour bus routes" and "Airport and North Lantau external bus routes". Their route numbering systems are independent. For example, there are both route 1, and route 2 on Hong Kong Island, Kowloon and Lantau Island respectively.