Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Hougang Ctrl Int → Bt Merah Int | 05:30 | 23:30 | 15–18 min | 15–20 min | 15–21 min | 20–21 min |
| Bt Merah Int → Hougang Ctrl Int | 05:45 | 23:45 | 15 min | 18–20 min | 15–20 min | 20 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.