Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Hougang Ctrl Int → Clementi Int | 05:30 | 23:30 | 9–11 min | 8–18 min | 10–12 min | 9–14 min |
| Clementi Int → Hougang Ctrl Int | 05:45 | 23:45 | 8–10 min | 9–12 min | 9–13 min | 9–12 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.