Operated by SMRT
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Choa Chu Kang Int → HarbourFront Int | 05:30 | 23:00 | 5–10 min | 7–16 min | 7–13 min | 13–14 min |
| HarbourFront Int → Choa Chu Kang Int | 06:00 | 23:30 | 9–14 min | 7–16 min | 7–8 min | 8–14 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.