routes 20 and 22 which are operated by Citybus. 2xx: Existing air-conditioned bus routes as a rule before 2008. However, the rule was abolished with the phasing out of non-aircon buses. 7xx: routes operated by NWFB 8xx: Sha Tin Racecourse routes Cross-harbour routes 1xx: Cross-Harbour Tunnel routes 3xx: Peak-hour only cross-harbour routes (except for 307) 6xx: Eastern Harbour Crossing routes 9xx: Western Harbour Crossing routes Alphabet prefix Prefix A: Airport deluxe bus routes Prefix B: Border routes Prefix DB: Discovery Bay Bus Service Prefix E: North Lantau external bus routes Prefix H: New World First Bus Rickshaw Sightseeing Bus routes Prefix K: MTR Bus (formerly KCR Feeder Bus) routes Prefix M: Some bus routes that are terminated at an Airport Express station Prefix N: Overnight bus routes Prefix NA: Overnight Airport deluxe bus routes Prefix P: City Direct bus services. Prefix R: Recreational bus routes (for Hong Kong Disneyland / Marathon) Prefix S: Airport shuttle bus routes Prefix T: Special express routes for relieving rail services: T270, T277 Prefix W: Routes that terminates at West Kowloon Highspeed link station: W1 Prefix X: Express routes for special services Prefix Y: Temporary route only in Typhoon (Y41) Alphabet suffix Suffix A, B, C, D, E, F: Conventional routes Suffix H: Hospital routes Suffix K: Mainly connecting to East Rail line (formerly KCR East Rail) stations of MTR Suffix M: Mainly connecting to the stations of Kwun Tong line, Island line, Tsuen Wan line and Tseung Kwan O line of MTR Suffix P: Peak-hour only routes (except KMB 8P, 40P,276P, NWFB 8P, 796PCitybus A29P, Long Win Bus A41P and New Lantau Bus B2P, which are for whole day service) Suffix R: Recreational bus routes Suffix S: Peak-hour only routes or special services Suffix X: Express services Brief list Routes or route ranges marked italic indicates that the route (or all the routes in the range) have been canceled already. See also Transport in Hong Kong List of bus routes in Hong Kong References External links www.16seats.net