Operated by SMRT
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Choa Chu Kang Int → Kampong Bahru Ter | 05:30 | 23:30 | 2–5 min | 4–7 min | 6–7 min | 7–11 min |
| Kampong Bahru Ter → Choa Chu Kang Int | 05:55 | 23:30 | 8–11 min | 4–7 min | 4–6 min | 5–8 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.