Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Bt Merah Int → Hougang Ctrl Int | 06:00 | 24:00 | 14 min | 11–15 min | 9–11 min | 15–18 min |
| Hougang Ctrl Int → Bt Merah Int | 05:30 | 23:45 | 10–15 min | 13–16 min | 13–14 min | 17–18 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.