| 172 |
Choa Chu Kang - Boon Lay |
| 172 | SMRT Buses | |
|---|---|---|
| From Choa Chu Kang | ||
| First Bus | Last Bus | |
| Weekdays | 0530 | 2330 |
| Saturdays | 0530 | 2330 |
| Sundays & Public Holidays | 0600 | 2330 |
| From Boon Lay | ||
| First Bus | Last Bus | |
| Weekdays | 0530 | 2330 |
| Saturdays | 0530 | 2330 |
| Sundays & Public Holidays | 0600 | 2330 |
| Bus Service Frequency | |||
| Before 0830 | 0831 - 1659 | 1700 - 1900 | After 1900 |
| From Choa Chu Kang | |||
| 05-09 | 07-13 | 06-09 | 08-14 |
| From Boon Lay | |||
| 05-09 | 05-13 | 07-10 | 10-13 |