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855  | 
    Tower Transit | Weekdays | Saturdays | Suns / PHs | |||
| 1st bus | Last bus | 1st bus | Last bus | 1st bus | Last bus | ||
| Yishun Int | 0535 | 2330 | 0535 | 2330 | 0535 | 2330 | |
| HarbourFront Int | 0535 | 2330 | 0535 | 2330 | 0535 | 2330 | |
| Period | 0630 - 0830 | 0831 - 1659 | 1700 - 1900 | After 1900 | 
| Frequency at First Stop* Direction 1 Direction 2  | 
    10 - 11 minutes 15 - 15 minutes  | 
    14 - 15 minutes 12 - 15 minutes  | 
    14 - 15 minutes 12 - 12 minutes  | 
    14 - 15 minutes 13 - 15 minutes  | 
  
Notes :
| 
				 *First Stop refers to the first stopping point of each bus service, which may be a bus interchange/terminal or a bus stop.  |