Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Serangoon Int → Ghim Moh Ter | 05:30 | 23:45 | 6–12 min | 5–20 min | 10–13 min | 13–15 min |
| Ghim Moh Ter → Serangoon Int | 06:00 | 24:00 | 7–8 min | 6–13 min | 8–10 min | 14–15 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.