At present, the card may be used on MTR services, as well as on the Kowloon-Canton Railway, major bus routes and some ferries. Plans are underway to extend its use to other routes and means of transport as Hong Kong's transport system becomes more and more integrated. Traffic drives on the left. Routes run throughout the territory, with cross-harbour routes via the tunnel. These, however, are often very crowded.
Exact change is required.
Air-conditioned coaches operate along certain Hong Kong and Kowloon routes. Maxicabs, however, operate on fixed routes without fixed stops. These can pick up passengers and stop on request except at regular bus stops and other restricted areas. These are plentiful in Hong Kong and Kowloon. Red taxis serve Hong Kong Island and Kowloon, green ones the New Territories, and blue ones Lantau Island.