Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Toa Payoh Int → Bt Merah Int | 05:30 | 24:00 | 9–10 min | 13–15 min | 10–11 min | 14–17 min |
| Bt Merah Int → Toa Payoh Int | 05:30 | 24:00 | 9–12 min | 10–15 min | 10–13 min | 13–17 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.